Header Video Issue and MS Edge compatibility Issues

I'm having a couple of issues with the header video. First issue, my header video doesn't seem to work on mobile devices. Are header videos supported on mobile devices? If so, any thoughts on cause? Second, I noticed that if I uploaded a header background picture it would show up on mobile devices in the place of the header video, which is fine but I'd rather have the consistency of the video across all devices. But when checking the layout across multiple browsers, I notice that the video doesn't fill the entire space on MS Edge browser and I see the underlying picture. Chrome browser is fine. Is there some way to ensure compatibility between browsers or to correct the issues with Edge? My site is http://allmixedupband.com Thanks!