I took a glimpse at your channel so I'm assuming you're referring to life/daily vlogs. In my opinion, daily vlogs are one of the hardest channels to get out there because unless you have an amazingly interesting life then a lot of people are not going to care. I had a conversation with someone about this the other week. Some of the bigger, famous vlog channels out there today didn't really start out as a vlog channel. Such as the Shay Carl. He made videos and gained an audience and then began to make vlog videos.
With any new, small channel it wouldn't hurt to have short videos. It would even be better to your advantage. If no one knows who you are you shouldn't make long, lingering videos. Keep them short. Anything longer than five minutes is insane. Edit out your video so your viewers only see the entertaining highlights. The short videos with music like in your trailer is more of an artsy video form. You can get views from it but I'm just saying now, it would be better to make videos that have humor and can make a viewer smile or laugh. Think about a video that can make it on the front page of the youtube channel.