Alternatively, can someone recommend a browser for Sailfish where YouTube works? Video playback, posting comments, replying to comments, editing comments once posted, the full shebang.

Note I need, "Yes, I have been using browser X for watching and posting to YouTube every day for Y years and all the functions you mention work perfectly fine, I bet my first-born child on it!"

I absolutely do NOT need, "I have used browser X for something completely unrelated and I think it should work for YouTube too, I cannot see why not."