Tried it on a couple of websites (including Youtube) with playing media but it didn't work for me. It "sees" the video and seems to try but all I get is the spinning wheel. Running Win7(64) with Firefox 115.18.0esr (64-bit). I used this successfully several years ago, but not now. I see many 5-star reviews posted very recently - so what gives!?
UPDATE 2025-01-22 was updated today. reinstalled, still failed - same behavior on different websites.