I've seen several Cascade Story Maps with looping videos behind the Title, but I'm wondering how to do this myself. When I try to add an MP4 video it won't allow it because the format is not supported. The only similar format supported in the background is .gif. I've looked into converting MP4 to .gif, but the quality would drastically change. Do I have to source my video from a platform (like YouTube?) or am I missing something? The footage I have for the title is epic and I really want to use it. Would appreciate any help regarding this.