I'm considering exporting all the videos currently stored in my Apple Photos library. These are made up of a mix of different video "qualities," including 1080p and 720p.
When I choose the File > Export > Export [number] Videos command, a dialog box appears prompting me to specify a quality of the exported files, e.g., 720p, 1080p, etc.
If I choose 1080p, I presume that my 1080p videos will be preserved in a lossless way. That is what I want.
However, I don't understand what will happen to my 720p videos. Will the software export them in a lossless way as 720p, i.e., keep the files as-is, or will the software do something else? Will it try to re-encode them to "up" the 1080p format, potentially increasing the file size?