Easy fullscreen

[JCU0]

Checklist

• I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• I have read the contribution guidelines given at https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md.
• This issue contains only one feature request. I will open one issue for every feature I want to request.

Describe the feature you want

Add a new fullscreen button to the row of big buttons below a channel name on a video preview screen.
Button bar should look like Fullscreen, Add To, Background, etc.
This new button should:

This new button should:

1. Switch to fullscreen.
2. Start a video if it is displayed as preview (not loaded, not paused)
3. Hide on-screen controls.

Also, this button should improve the UI consistensy as all play modes will be grouped on the same button bar.

Is your feature request related to a problem? Please describe it

With 0.20.XX version, you need to do 4-6 clicks to play video in fullscreen:

1. Tap a video in a feed (channel, playlist, etc)
2. Tap the video preview area for a video to start to play.
3. Tap again for controls overlay.
4. Tap a small fullscreen button (some pixel-hunting skills required)
5. Tap again to hide controls (bug Controls remain on screen after switching to fullscreen before video has loaded #4950)
6. Double-tap to rewind if I want to watch in fullscreen from the beginning.

Additional context

Other people also want easy fullscreen mode access.
Related issues (not full duplicates for my issue):

• Swipe up on a video to go to full screen Swipe up on a video to go to full screen #5299
• Add option to directly open fullscreen when tapping on thumbnail Add option to directly open fullscreen when the main player starts #5459
• New UI for Andoid TV New UI for Andoid TV  #5307 (...Playing a video in fullscreen is quite hard to do....)
• FullScreen button FullScreen button #5111
• [androidtv] Enable option to play automaticly in fullscreen [androidtv] Enable option to play automaticly in fullscreen #4387
• [Feature request] Add a setting that the video is always start in fullscreen [Feature request] Add a setting that the video is always start in fullscreen #5281

How will you/everyone benefit from this feature?

Fullscreen mode is the most natural way to watch videos. A lot of people prefer to watch videos in fullscreen. So, ability to quickly switch to this mode should greatly improve app usability.