For now, when playing multiple videos, the soundtrack of each one will be played simultaneously with the others.
One possible solution to solve this issue is to set a trigger for each video and link it with actions to set volume of other videos to 0.
The idea here is to address this scenario more easily with a simple action that set volume of playing videos to 0 automatically when playing a particular video.
I agree, but think the situation could be generalized to: “give priority to the sound of the most recently triggered video”, rather than “when playing a particular video” as stated above.