how to trigger based play a text, video and animated symbol

Hello

I have an animated text followed by a video followed by animated symbol. I have a next button with the following commands

sym.getSymbol("slide").play();

sym.play();

The problem:

I can go next from the text to the video but have to wait till the video finishes playing then the symbol comes in automatically. if i click next while the video is playing. The animation progresses in the symbol and it misses the starting animation.

What i want is while the video is playing and i click next the video stops and the slide starts to play.

Project file here: https://www.mediafire.com/?0zv067hgt6g0l7x

Can anyone help ?

Thanks