So I watched a little. I don't think it's quite as interesting when you can't get peeks at their hands like a live game or see the hands like on OCTGN. We can't even see their accesses. The first game is without any context, as in what players, what decks, so play-by-play in itself isn't as interesting as it would be in a tournament. So we can't really follow their decision making because we don't see the cards they see, and we don't care who will win because it's just a couple of random folks testing decks.
I don't want to sound too harsh, but there are lots of casted games on youtube and many of them don't have these problems. There's nothing wrong with your production quality and casting voice. I just don't know why I would watch these videos over tournament videos or just observing a game on Jinteki myself. Maybe cut back on the play-by-play and talk about their decision making. Or maybe cast your own games so you can talk through your own decisions. You need something more.
Anyway, I hope I don't discourage you from working on it. I just want you to make sure you're headed in the right direction.