Don't know exactly what were looking at but is it the small pc of glass adjacent to the door that is moving?

You're not going to be able to safely or permanently fix that with glue. The door needs to be dismounted, the small glass panel needs to be removed, and the bracket needs to be removed and then reinstalled properly, probably with additional drilled holes. Because your video doesn't show how the top end of the panel is secured, it's not possible to give you complete advice. It's basically a bad design, so get a professional to repair this as chispa stated.

There is a drilled swivel on top and bottom that helps it stay in place, but it looks like it was glue that was whats holding it from swiveling. Any clue what kind of glue I should use? Silicone Sealant?

Mark-

Re-read what people are telling you: glue is not a solution. I know you probably want a cheap fix, but that's asking for problems.

The only type of thing that will properly fix that is a professional. Anything you try will likely result in the small glass panel shattering and the shower door either shattering or getting damaged. The proper fix now is cheap relative to the cost of a replacement of both items later.

A real photo would help here. For me, at least, the video clip actually makes it harder to really see what's going on.

I assume your problem is that what appears to be a pivot at lower right has broken loose from the glass door. Is that correct?

One of the challenges here is to re-bond that pivot in exactly the right place for the door to close properly. You have only once chance to get it right.

If I were going to try to fix this myself, I'd probably start by ordering a new pivot and some of the factory adhesive from the company that made the door. There's no adhesive in the world that will hold unless the glass and pivot inside are factory-clean.

I'd mark the current hinge position carefully, remove the door from the shower, clean the glass thoroughly (somehow keeping the position mark intact, darned if I know how), and then bond the new pivot following the manufacturer's instructions carefully.

I think what I'd be more inclined to do is mark the pivot position, remove the door, and take it to a good local glass shop to be repaired by someone who knows his stuff better than I do.

I might even try to order a complete new door from the factory.

Whatever you do, make sure you know what you're doing. As others have pointed out, that's a mighty darn big and heavy chunk of glass to have fall and break when you're standing dripping wet and buck-naked next to it.

It looks to me that the small piece of glass is supposed to remain stationary, but the bracket is only mounted with a screw in the middle, so it is pivoting (which is what I believe kudzu9 and some of the other posters have stated in different words). Needs more than glue.

There is a drilled swivel on top and bottom that helps it stay in place, but it looks like it was glue that was whats holding it from swiveling.

Back up and take a picture that shows the entire length of the door, swivels, & hinges.

Something has gone out of adjustment because the door is hitting that small glass partition.

Could be the hinges need adjusting and the fasteners retightened. Could be the swivel socket has worn. In any event, right now it is a minor problem that needs to be fixed before it becomes a major, expensive problem. To diagnose, you will need to slowly open & close the door and look at each component--pivot points & hinges. Watch & test for loosened hinges, play in the pivots... Odds are that we won't be able to find the problem looking at pix or a video.

Given how pricey shower enclosures are, how heavy glass it & the somewhat fragile nature of the material, IMO, it's money well spent to call a glass store that sells & installs shower glass for the repairs.

I would like to see a pix of the whole assembly. Because I don't like how the door is hinged on that small section of glass. From what I can see, the design looks like trouble waiting to happen. 'From what I can see'...that's why I would like to see the whole set-up.

ci_lantro- I agree with your entire post. I also think that, even if this is properly repaired, that narrow strip of glass with a heavy door hanging on it has a high probability of fracturing in the future, which could cause the door to fall and shatter. It would be good for the OP to see if a professional installer can come up with a fix or re-design that doesn’t involve re-working all the glass.