Media players are a textbook example of state machines — the playback states (playing, paused, buffering, seeking) have clear transitions and guard conditions.

• Playback states: idle → loading → playing → paused → seeking → ended

• Guards for seek availability

• Parallel states for volume and playback rate

• Actors for audio/video element control

• Pattern: Data Fetching — Buffering async loading

• Pattern: Animations — Animation states

• Learn: Actor Model — Actor-based media control

• Add complete media player machine

• Add playlist management

• Add keyboard shortcut handling