FWIW...I was having the same problem with my Galaxy S21 and downloading the attachment in GMAIL did the trick for me as well.

Ahhhhhhhhh..... I thought so. Why do the videos have to go to the proprietary folder? Android security? Can the save folder be changed or is backing up the video the only way out? Thanks for the response!

Can I recover my internal videos after an uninstall/reinstall? I got my data back but video from the "Android\data\com.harrys.laptimerpro\files\Movies" are gone.