There is a program called Folder Lock
https://www.newsoftwares.net/folderlock/
I often ask girls if we can do a video.
If I think I may do a video I bring a mask, then ask very nicely explaining that it is only for me and never for anyone else and completely secure on my computer.
If they are reluctant, but don't given an emphatic no, I bring out my cute mask that the girls all seem to love and they try it on, look in the mirror and many will say yes at this point. And I make it a point to give them the camera to start, then take it to show my POV and boobs.
I always take a 20-40 second video and then stop recording and show it to them. I will stop and show them a couple of times depending on how much they like it.
And I use a mirror if there is one in the room and film using a mirror as it usually gets more of the action.
Great for the money shots too.
I have now purchased about 10 masks now, as the girl will often ask to keep it.
I buy them 2-4 at a time.
The program is great because you just take the SD card from your camera, unplug your computer from the internet, copy the files from the SD card to a folder on your computer, name and date the movies (the date taken is automatically added, and I add the name of the girl before the date). I then copy the recent movies to a 256 GB SD card which I then encrypt using the Folder Lock program, and I then encrypt the movie files on my hard drive using the Folder Lock program, and then delete the movies from my SD card and put it back into my camera.
The great thing about the program is that when you to to the folder where the movies are stored, there is nothing there. No files. No names. They are invisible.
You have to start the Folder Lock program, insert the long complicated password that you will remember and not write down for a SO to find. and then the file names will appear and you can watch the movies.
I've only had one girl ask me (a year later) to delete her movies because a friend told her some story about something that happened to her, which I did with great reluctance.
The main thing is trust. They have to trust you.
That is why I never share movies with anyone under any circumstances.
Some girls are really turned on about the movies.