lbry-desktop--6844
This negates 49abbecb.
Now that we have a dedicated chromecast button, we don't need to hack Chrome's default cast button to appear on top of vjs-mobile-ui. The hack no longer works anyway, since the CSS exposure has been deprecated around mid 2020 -- it is still available, but its abilities has become less and less.
## Issue
One of the items in 5865 Video shortcut issues
This one is not really an issue, but it would be nice to match what the arrow keys are doing. Also, in slower regions, seeking 10s will almost always end up buffering.
## Issue:
5119 "Video: Mobile UI + overlay for keyboard shortcut feedback" was disabled because the feature broke the chromecast button in Android Chrome