Hmmm,when you say on YouTube, do you mean like the 30 second ads that you have to watch 5 second of? That could be expensive. I find them very annoying, any I never would click on such an ad; but that’s just me.
If you’re talking about having a full video, wouldn’t people prefer a third party review? I believe that there are several already, but I haven’t watched them due to my very slow mobile broadband connection.
Either way, I’d be glad to help in any way I can.
PS. Could there be a copy issued without any narration, so that translators could easily add a narrative in their language?