Can't save videos from Google Drive/Photos/Files to Camerall Roll

Hi,

The issue I am having is really simple. I have a video in my Google Drive and I can't simply save it to my camera roll. All I can do is save it to the "Files" folder, and that's it, I can't go any further. No "Save Video" option is available anywhere. The video is totally openable and reproduceable without any issues.

I also tried using Google Photos, and I do get the option to save it, but after several tries I only get a "Trouble saving. Try again later" message. Is not a matter of the file, it doesn't have anything in particular, just a plain mp4 video of 180mb. I have other files in my "File" folder and same, I can't save them to the camera roll.

Mine is an iphone 13 Pro, so LOL, is not a matter of insufficient size (65GB of 256GB are used).

Any solutions please? It is really a bummer to have paid $1000 for the "PRO" version and not being able to just save a freaking mp4 file.