How do i import an video in UE4 in version 4.19.2

Me and my teammate are trying to do a congressional app challenge but we are having problem importing video from YouTube

YouTube might be encoded in a way Ue4 doesn’t support. See if Handbrake or another video conversion tool can whip the downloaded video file into a shape that Unreal can handle. I don’t know what the format and encoding requirements are (and DRM considerations) but there is documentation on the official Unreal site about it.