Stop video once you move to other section

This is a one page theme, and I have a video slider on one section. I want the video to stop when the viewer leaves that section, but it doesn't.

It doesn't start autoplaying until they get there, but when they leave, it continues to play. It's super annoying to have the video start playing again every time you pass that region.  I like autoplaying it, but I just couldn't