I’ve ordered a custom vid from a SSBBW model on OnlyFans, which was nicely done and then sent along via DM. How do I download this? OF doesn’t allow download, and it wouldn’t come through on a rip site like coomer. Screen recording on my phone is autoblocked as well.

You could rip it with OBS if its just the one video. Just record your screen.
Or try some chrome/firefox extensions
Or try ViolentMonkey scripts

Then post here since I helped you.

Oh wait nevermind you're a phonefag. Install gentoo.

Open the clip in the browser and then go into developer tools, shortcut is Ctrl + shift + I. Click on the inspect element button (it has an image of a cursor I think), hover over the video and it will highlight a link in the html, click on that and you should be able to download. It's always worked for me.

If you're on Android and have a computer you can use scrcpy to mirror the phone screen onto your computer and record from there via OBS, i guess.