Why in the world are there only two? That's your problem right there.
How many competent devs are right here in the comment section? Why is it so difficult to get their help?
> Free. Open-source. For users by users. No donations sought.
> If you ever want to contribute something, think about the people working hard to maintain the filter lists you are using, which are available to use by all for free.
You may have missed "there are only two people on the uBO team dealing with YouTube" rather than "on the whole team".