Try using a different browser.

Also try clearing all the history and cached files from the browser you've been using, that alone could fix the problem if it isn't something you do regularly or of it isn't set to do when closed.

You keep saying Utube Red? only red I know of is Redtube which is a Utube porn site, Great place to pick up lot's of viruses.

haldd, Elmer's suggestion surely won't hurt. I'd give it a try: "clearing all the history and cached files from the browser" What Browser are you using, is it Google Chrome (Maybe I missed it in your post)?
Is this the newest Update: Security Update for Adobe Flash Player for Windows 10 Version 1607 (for x64-based Systems) (KB3202790) on your computers?

aputernut, here is a link to YouTube Red!

I would suggest trying Chrome, which doesn't use Flash to play videos. I'm also assuming you've updated Flash on a regular basis.

aputernut, YouTube Red is a pay service offered by YouTube that, among, other things eliminates the ads that are part of YouTube videos. RedTube is a porn site but contrary to popular believe most of the reputable porn sites don't infect your computer with viruses. They are money making businesses and while some may find their content objectionable, the reality is that they have no more interest in passing along viruses than a mainstream site. Upsetting customers isn't a good business model.

I was talking about You Tube Red, not the porn site...

Houzz couldn't find my email address and password this morning...another related symptom?

I tried Chrome on my MSI. Same issues; some videos play, some don't. I also noticed that in Chrome the video card may have issues, as there is an annoying flicker. Surprising because the video card is the latest Nvidia with lots of video memory. Both laptops are completely and thoroughly up to date via automatic Windows updates and the flash player has been updated several times this week. FYI, I gave up on customizing windows settings because I found I could customize them and they would be reset by Microsoft after updates, so the current settings are whatever Microsoft has set.

I'm putting this all aside for the weekend. In another post Elmer suggested Apple. I'm considering that because I don't feel like spending hours (days) trying to figure out these problems...

Thank you for the suggestions. I tried them all.

Only other thing that crossed my mind, does anyone here use the Opera browser? I thought about trying it too...

If this was one computer, at this point, I might be thinking something like a video driver. But you have two computers and I believe different video chipsets. So there needs to be something in common between the two computers that's causing the problem. Obviously there's Windows 10 but I'd think you'd find a lot of other users with the same problem. Is there any other software common between the two machines that might be causing a problem?

Have you tried Safe Mode with networking?

I use VUDU, not Google RED for my movies. I find that my movies (even though I have SD HD and HDX) will only play on the TV in my Bedroom on SD. My TV (Smart TV) is more than capable of handling HDX and Comcast says my Internet is also capable too! Comcast has been out a number of times to check my connections and speeds! I've replaced the Modem/Routers many times also, but still no HD or HDX!

My suggestion would be to try running Google RED at an SD Speed if the Option is there in the Settings. I spent hours and hours on this problem, finally figuring it out by mistake! I can now watch my movies, just not at the quality I'd like!

Just a suggestion: I see you're using an NVidia Video Card.

There have been many problems with the NVidia Drivers Microsoft is supplying for Windows 10 (since the beginning of Win 10). Think I'd uninstall those Drivers and Reinstall Drivers from the NVidia Website (for your Video Card). I know that won't correct the problems on your other devices, but it certainly won't hurt the computer with the NVidia Video Card in it.

I tried almost all the suggestions. I haven't tried the suggestion about Nvidia by Bugspot1, though I may...Chrome sorta works but there is flicker on everything..and premium youtube content won't play, so there must be some sort of protective coding happening that prevents playback. As last week, support calls didn't help...

Over the weekend I installed and tried a couple Youtube apps from the WIndows store. They also sorta worked. The Tubify app worked so good it was providing paid content for free from HBO and I had to call support to make sure I wasn't being charged...it scared me a little!

I got a new macbook pro and IpadPro on Sunday. Wouldn't you know it - I haven't been able to set them up and use them because there is a lag time before Apple has them registered in their system. I had planned on getting them for using home audio recording software (I play several musical instruments).

Last night I watched Netflix and Amazon video on the Windows10 MSI. No problems. This morning Im typing this on a Dell Inspiron 13 5000 series laptop running Linux Mint. Everything works, including the videos on CNN and UK DailyMail.

At this point I think there is a glitch somewhere in the Google and Adobe Flash systems that is beyond my power to fix...

Really funny that they worked when they haven't been working!

1. Have you tried using YouTube Red on the Microsoft Edge Browser?

2. Have you tried Uninstalling Adobe Flash Play and then Reinstalling it

3. Have you tried adjusting your settings in Adobe Flash Player (Go to Start> Search> type Adobe and you should then see Flash Player listed under Settings)

4. Are you allowing Adobe Flash Player access thru your Router, how about YouTube Red (hardware and software)?

Can't help with the problems but youtube red is a fairly new monthly paid service from youtube. Imagine it's something like Netflix and hulu. Don't belong to it so have no clue how it works. I have the youtube app on my smart TV and access youtube that way. Mary

Things are about the same as when I last posted. I'm giving up on fixing the problem. There definitely seems to be some weird things going on with Google and Amazon that are out of my power to fix. The MSI laptop using Firefox won't play videos in Adobe Flash or html5 and now has started closing itself so fast after opening that Firefox is pretty useless. I rolled back Firefox 50 to 46. It didn't help. There's still flicker using Chrome. I used Internet Explorer and had the same problems. I tried apps from the windows store and they didn't work...The Acer R in my kitchen using Firefox works fine....The only difference between the 2 laptops is the one in the kitchen isn't used for watching Youtube or Amazon Or Netfliix. Both are set to automatically update everything... so the $$$ I've spent trying to get this mess to work has been a big waste. It feels like these companies are vacuuming the money right out of my pockets. Thanks for the help and suggestions.

Now you mention Amazon if you are having trouble with their videos have you tried contacting them? Their video team is very helpful. I don't watch Amazon videos from my computer as I use my kindle most times or my Samsung tablet plus I have the Amazon app on my TV to watch. Mary

Sorry not much more help here. I've been thru this type of thing before. You have a problem, you contact 10 different companies about the problem. Each company blames someone else and are of no help!

Without rereading everything:

1. Did you ever make sure your Anti-Virus and Malware Protection are up to date and then run a Full System Scan Including Rootkits on all available hard drives?

2. A Free Online Scan at eSet Online Scanner might not be a bad Idea either (again, set it to Scan Everything).

3. Did you try a System Restore?

4. Ever thought about Formatting and Reinstalling the OS, Programs and Apps?

I'm going to try Bugspop1's suggestions. I have Xfinity1 and ATT routers, so it may be perilous and require calling them again for help. Also both routers have been replaced in the past 2 weeks because of other problems:

The ATT router suddenly and mysteriously stopped allowing any telephone caller ID and calling features...the technician who replaced the router said he didn't know why this happened or what caused it. ATT provides 3 mbps speed, which is (from my experience) not fast enough for Amazon video, so we use ATT mainly when Xfinity isn't working. We have just one phone connected to ATT.

The Xfinity/Comcast router was replaced last week because of tv issues. I got fed up with the poor service on the last cable boxes. All channels not HD were stretched to fit the format of our HD tvs. So all the people on tv look like they weigh 500 lbs. Comcast refused for months to provide info to change this in the setup menu of the cable box. So after hours on the phone to them and several trips to their store, we now have tv that shows HD and SD in the proper formats. I also had to accept yet another phone line from Comcast, their bundle, to save money. Their internet/tv bill was $270. The new bill including phone is now supposed to be $190. The stupid downside to this is the Comcast rep said I have to call Comcast on the phone number they provide, otherwise they won't provide any support. I already have 4 phone numbers so this is very annoying to me. After the cable boxes were replaced the internet router was reset by Comcast when they set up the cable boxes. That evening I logged in to the xfinity web site and saw that some videos would play and others wouldn't. CNN wouldn't play anything at all (though accessing the site outside of the xfinity portal allows some videos to play). So I called up Xfinity support who weren't helpful at all. They actually said they don't support video playback help issues on their own site! So their support is less than adequate imho.

I tried the suggestions about changing video quality...Amazon works ok in SD. In HD videos start off in very poor quality and gradually get better. I don't use amazon streaming when I'm out of town because the site only streams in HD and would quickly use up my data allowance.

Windows Defender is up to date. Nvidia has automatically updated it's drivers several times since I got the MSI laptop. The MSI also did the update where it installed a new version of Win10 (It took about 17 hours).

There isn't any software in common on the two laptops. I tried a system restore on the MSI. It didn't help, but it didn't hurt. I uninstalled and reinstalled Adobe flash several times.

If I can get inside the router setup menus is it easy to figure out if the routers are allowing adobe flash video?

I'll keep working on this....

To get to the xFinity Router Setup, it's http://10.0.0.1/ The User Name is admin and the Password is password, unless you've already changed it!

I think I figured out what is going on:

"Starting in August, Firefox will block certain Flash content that is not
essential to the user experience, while continuing to support legacy
Flash content," wrote Benjamin Smedberg, the manager of Firefox quality
engineering, in a post to a company blog...The initial blocking Smedberg mentioned will be based on a list Mozilla
will generate by crawling the home pages of the top 10,000 websites as
ranked by Alexa. Flash content that those sites use to "fingerprint"
users, or as "super cookies" -- two techniques to track visitors for
advertising purposes -- will land on the list, and thus not be run by
Flash...

Firefox is late to the dump-Flash party.

Other browser
developers -- Apple, Google and Microsoft -- have been more active in
limiting Flash. Safari has frozen some Flash content since 2013, while
Chrome did the same in September 2015. Edge will follow suit with the release of the Aug. 2 upgrade, Windows 10 Anniversary Update..."

http://www.computerworld.com/article/3098606/web-browsers/firefox-sets-kill-flash-schedule.html

I think this explains what's been happening, no matter which browser I'm using. Also, I had installed a browser extension in Firefox that pops up when you close the browser and gives you the option of removing super cookies. I had these cookies every time I browsed...and sometimes the videos would play as html5.

Thank you so much for all the help. Maybe nothing is wrong after all...

I have nothing to add to any of the advice that you've received in this thread, haldd...except to agree with your final conclusion regarding the treatment of Flash...and Firefox. It's been driving me slightly bonkers lately but I knew it wasn't my overall system so I'm learning to grin and bear it. Sigh. And you're quite correct in that Firefox was one of...if not "the" last one to join the parade.

Interesting theory. I mostly use mobile devices full time now. Both my computers are windows 7 and IE 11 and I don't notice a flash problem on sites or maybe I don't visit sites that have this problem. Mary

That would make sense as to why you're having trouble on all of your devices, not just one. I haven't had any problems myself, but I'm not using YouTube Red. I do use regular YouTube quite often, but I don't have any problems with it. I have VUDU and Netflix on all of my devices and they both work great on all of my devices (TV's, Computers, Tablets and Phones).