It's not short, no, but it's not too long either. The video doesn't overstay its welcome, you know?

I think it's different because it's not just you reacting to a new game, you're actively explaining it. And you're not just explaining it, you're reacting to it the same time. Many let's players just play the game, no questions asked. You explain rules and modes and give us your thoughts on how it works, how fun it is and so on.