Hi Stefan,
Thanks for your question. To be honest, I don't know about iOS functionality, as I use this workaround on an Android device.
Did you try opening the website in desktop mode first? Maybe that works?
Otherwise, try looking on the Brave Community forum, there might be someone with a similar request: https://community.brave.com/
Also, you can take a look at Odysee, they recently announced that they've removed ads altogether. More YouTube content creators are storing their videos over there in parallel, you might find what you're looking for there.