Video Resolution Options

When it comes to stock video, is it not possible (like Videoblocks) to have different resolutions options for download? Videoblocks have 4K, .mov and HD .mp4 options, which are so useful. I find myself often having to convert a 1.8 gig .mov file to a 40mb HD mp4 file, because 4K is overkill for me. So time consuming.