I did see one other person that could record it using the plan with ads. The other person responded said they used the "best" plan, which I think is the ad-free plan. I can play anything in the StreamFab browser, but I have to wait for the ads to finish first, which is what I would expect since I do have the plan with ads.
When you play it in the StreamFab browser, do you have ads? Something just seems odd. However, this wouldn't be the first time that something works for some or most people but some people things doesn't work.
When you analyze a show/movie for the first time on Disney +, does it take a long time to analyze or does it happen within a few seconds? Normally on other services like Prime, it only takes a few seconds to analyze.