i'm not sure (never purchased an OnlyFans subscription) but i understand downloading can be an issue, even with programs designed for that purpose. have you tried using screen-capture software? Free Cam is very simple to use, is free (as the name implies) and has no duration limits or watermarking. at one time you could convert the files to WMV directly after capturing them, but that doesn't seem to work for me anymore, so i have to use a separate file-conversion program to render them out to mpeg format. sure, it's an extra step, but if it's something you really want to save then i definitely think it's worth it. (and you can find plenty of free file-conversion programs online). OBS is another free screen-capture software, but it's kinda clunky and, at least for me, fairly complicated to use. i'm pretty sure OBS will let you render out the files as various formats, but to be honest, i didn't care for the program and deleted it shortly after installing it...LOL. in any case, let me know if you have any luck.