VLC is a quirky beast. Now, when I add a new video in the MacOS Monterey finder, having selected my iPad, and then navigated to the Files tab, and expanded the list of videos in VLC, and then dragging the new file onto that list, what do I see?
In VLC on iPad, the file is not there.
However, in Files.iap on iPad, having selected iPad on the left of the Files window, there is the new video I just loaded. If I open it, it opens in VLC for iPad. However, after I close it, I can still only find it in the Files.iap. I can not add it to a VLC playlist, a vexing thing to notice.
This is truly bizarre. The VLC iPad app has a limited ability to display files, but it has a semi-secret "overflow" set of files in the Files.iap.
As an obscure user interface that some might be tempted to call hostile, it is breath-taking.
But, I have let the secret out, so you can seek your VLC files there as well.
This bug was known in 2020, and developer Felix Paul Kühne said, in a reply that acknowledged privacy implications, that it would be fixed in the future.
Intending no disrespect, it is now the future.