Improve Mobile Video Player Gestures & Controls

The mobile video player could use more intuitive touch gestures and better touch targets. Some suggestions:

• Double-tap in the middle or Swipe down to exit fullscreen.

• Swipe up on the player for full screen enable

• Long-press for 2× speed instead of 3×.

• Fix the current long-press gesture, which sometimes shows the video source link instead.

• Increase button hitboxes to make controls less fiddly.

• Add other common mobile video-player gestures where appropriate.

The PC player feels fine, but the mobile experience could be much smoother and more intuitive.