HEIF has a ton of issues when you use it with H.256 (HEIC). But basic usage of it is almost identical to any MP4 video file, it just has a few bits of metadata

HEIF has a ton of issues when you use it with H.256 (HEIC). But basic usage of it is almost identical to any MP4 video file, it just has a few bits of metadata saying "I'm an image". That's too trivial to be patentable.