The beginning turned me off. You have a good casting voice, the right amount of enthusiasm, but I was pulled out of it when you didn't really know what was going on and didn't have stuff like the player names beforehand.
I don't watch a lot of casts, but I imagine it would start with the team names, what map they're playing, and then during the set up or whatever you could delve into who is who and plays what, that kind of thing.
I don't personally take offense when you said, "Jesus Christ" but some people might, so it came across as less professional. But I could just be too tentative with stuff like that idk.
When you started talking about the silly names of the players, just the way you talked about it made it obvious that you were trying hard to fill in the silence and lack of action. If possible, it would be good to read something about the teams or say something like where they are in x league, stuff like that.
I'm impatient with most videos so that's as far as I got, but definitely not bad at all for your first 6v6 cast in my opinion, I hope you put out more stuff!