Videos have recently been changed to support zooming, but this can make
the controls in the centre of the screen unergonomic as they will either
stay in the centre when dismissing, or stick to the video when zooming.
Neither is great. We should align the behaviour with other apps which
has the play/pause toggle at the bottom of the screen with the seeker
bar instead.
Co-authored-by: Alex <alex.tran1502@gmail.com>
Consolidate video state into a single asset-scoped provider, and reduce
dependency on global state generally. Overall this should fix a few
timing issues and race conditions with videos specifically, and make
future changes in this area easier.
