While no version of AR can record to any form of video format, you can record and save your painting sessions as ARScrips.
After doing that you can then run your screen recording software of choice whilst playing back your painting session for it to record as a video file.

It’s also worth noting that as ARScripts are mostly in a human readable form you can also, using a Text Editor, do some pre-editing of the script itself before playback if you wish to remove things like unwanted AR generated message windows that may have shown while you were painting, etc…