A gap appears underneath a player that takes up the entire page, such as in an iframe embed

[DoomTay]

On a minimal example, this only comes up in Firefox, but in a real-world implementation, not only would it happen in Chrome as well, but on Chrome, the scrollbar would rapidly appear and disappear

Here is a minimal use case, along with a real-world example

[gkatsev]

So, a workaround for this is to add scrolling="no" to the iframe embeds.

In Chrome, locally, it actually works fine but I do see it in Firefox.

Investigating it, it seems like the progress-control is the one that causes this issue.

[gkatsev]

Looks like it's the time tooltip of the play progress bar that causes the overflow.

[gkatsev]

Seems like the fix is pretty easy to just change position: relative to position: absolute for the tooltips?

[gkatsev]

I've create this issue for first timers to supply a fix #5354