When interacting with the timeline (not in fullscreen mode), it's difficult to grab and adjust the duration slider. The clickable area seems too small, making it frustrating to grab.

It would be good to add a visual indicator because the hand cursor is used for all of the bottom part of the player. This means you are unsure if you are clicking the slider or the fullscreen toggle.

Suggestions:
Increase the clickable area (the hitbox height ofc).
Consider adding a visual indicator on hover effect.