Your questions are entirely too vague to offer any meaningful advice.
ok so about question 1:
we are moving on the main timeline between frames.
when u go to the next main frame (the one after the video's one), and then go back to the frame where the video component should be, but it's gone
when opening chrome dev console it doesn't show the video tag anymore, even tho the container div exsist.
I still did not quite get your question. Can you provide us with a quick video on what's happening?
sadly i cant,i am not sure what is not understood to be honest.
when on the frame where the video component is, moving to the next frame in the main time line (by gotoandstop) and then going back to the frame where the video component should be, but its not there.
maybe check the link i connected? (this question was asked before by someone else and got unanswered)
i just realized my link is wrong, this one is the correct one: HTML5 Canvas, Video Component with timeline navigations