Can iMessage send a video as-is, without converting it first?

If I share a video file via iMessage, the recipient doesn't get the exact file I've shared, but a converted version of the video, which has a lower resolution and lower quality (e.g. when I share a 1080p H.265 video, iMessage actually sends a 300p H.264 blurry mess.) Is there a way to make iMessage share a video without re-encoding it? What are the technical criteria that video files have to meet in order to be spared re-encoding? (codecs, profiles, resolution, file size) I know I could share a URL to a file hosted elsewhere, but I want to have end-to-end encryption, and I don't want to require the recipient to perform any unusual steps or leave iMessage to view the video.