I watched your videos there and I think it could be good if you were to have an intro, perhaps where you introduce the video in person, show your intro briefly for 3 or 4 seconds and then get straight on with the rest of the video, you could do it that way or opt for a really short intro like 1 or 2 seconds right at the start, I prefer the first method though because it is damn hard finding a suitable 1 or 2 second sound clip other than banging noises etc
Your content is good and the quality and audio is so there are no problems there.
I think you could do with a better image on your background, at the moment it is very dark and the quality is quite poor probably due to lighting when taking it and I think it doesn't do your videos any justice as they're fine. You could use your video editing software to take a still image from some part of one of your videos and use one of those or better still you could take another with better lighting next time. I think vlog channel backgrounds always look best when the vlogger has been cut out in Photoshop and put on top of the rest of a design, if you can do that or get someone to do one for you on here that would be good.
Your About Me could do with a little more information about the types of videos you do but it isnt too important.
Overall you're doing a good job especially with getting views and an audience, I dont think there are any problems there, keep it up