This allows sending the event to the specific video, not to all the
currently playing videos. Also, this allows to distinguish video from
audio loops and only process video skipping events when playing videos
This adds volume control to the game by setting the mixer sound type on the
various audio streams to values other than the default "plain".
This uses the following sound types:
Ambient (music, environment sounds): music
AI voice: speech
Effects, interface, footsteps, movie audio: SFX
This could be further improved by specifying sound types for individual sounds,
f.e. SFX for environment sounds, or music for the "effects" in the appartment
which are short musical cues. The movie audio is of course pre-mixed music,
speech and SFX.