Slider Revolution – 5 videos

Hello from Belgium and thank your for your amazing theme!

I would like to set up a video slider with 5 videos (1 video/slide).

1st question: is it better to add video as background video or as layer?

2nd question: Here is a test i made: http://www.im-corp.eu/?page_id=24501
I don’t understand why there s a few second (I think ’9 seconds’ exactly the lenght of a slide) with no video between each slide?

Thank you very much for your help!