Well I’ve seen thousands of demo reels, and you should perhaps take a look at some guides on the subject and at least look at some done by the more experienced people here on the forum and other places. Kill the fast paced music and volume, it isn’t helping.
If presentation is everything, you are limiting yourself.
I assume from posting here you are interested in modeling. You are not clear, here or on your site or in your video.
I do see a few things that show potential, again it really depends on what you are looking to do and in what market. Your 3 Flaps character is your best as it is original looking and has a more relaxed feel. Almost everything else is too perfect, too plastic and makes the viewer wonder what if anything you did in Zbrush (not good things). Your sculpting ability needs a better understanding of mass and form, but various parts show you have skill if you focus.
If you have areas that you are not good at, such as lighting, rigging, etc., perhaps you have a friend(s) that can help you get the most out of your efforts.
The best judge and guide is yourself. Do you feel that this collection of work compares to various levels on this forum or any other forum? Does it compare to demo reels posted here inthe past? Better? Be honest with yourself and do ONE good piece, rather than several that aren’t your best effort. Then work on another, and each should advance the result of the next.
I do wish you all the best in pulling that little extra out to give you freedom to be really creative.