Here's my setupL:
I've created 5 dynamic playlist with videos, at the end of every block I want to play a Youtube video for 20 Minutes. After 20 minutes I've set a time out event to launch the 2nd playlist a.s.o.
Now if I set the HMTL5 widget with the youtube link as initial state, the video will play for 20 Minutes and launch then the first dyn. playlist. But at the end of the playlist no other youtube video will play.
If I set the playlist to initial state the video won't start at all.