I've never made a trailer before, so take everything I say as a suggestion.
Personally , I don't find it engaging enough. It's an okay trailer, but you want to strive for "WOW!"
- It feels a little dry watching it. Adding background music could keep the the video more flowing.
- Try being more yourself when you talk. This might only bug me, but your voice for when you play and when your talking in this video are different. Just be yourself because you want people to subscribe to you, not you trying to be something else. Also your normal voice feels more connecting/engaging in my opinion.
- Every second in a channel trailer counts, so personally I would have taken out one of the first two clips. The first two game clips have pretty much the exact same reaction which seems a tad redundant. However, if you put them there for a reason I can't argue with you, it's a preference thing.