Missing videos from iPhone Gallery
Hello. I really need some help with the following problem:
I added sound to 7 videos filmed with a drone using VSDC program on my laptop, then I uploaded them on my Box account (it is a popular app like Dropbox).
The first day, I saved 2 of them to my gallery on my iPhone 11 Pro using Box mobile app and everything was fine.
The second day I tried saving the other 5 videos, a message appeared that they were successfully saved in the gallery, but they do not appear anywhere and the number of items in my gallery was the same as before (so it seems that they were not saved there). However I had much less available space on my iPhone after the process so they must be somewhere.
I've checked the whole gallery, the DCIM folder, the iCloud account... nothing!
How do I manage to find them to free that space?