A good start I reckon. I see you seem to have used anti-shake settings in your software, which cut off peoples' heads. I find 90% of shooting video is keeping the camera still.
Personally I don't like Aikido videos with music. Maybe that's because I watch videos of Aikido online to learn something most of the time, not for entertainment. When I hear music, I think of marketing.
You're spot on about the heads - I use the warp stabilizer in Adobe Premiere that tends to crop the footage down in the way you described. My sensei noted the same thing, I've tried to work on it a bit though ultimately I think it takes away from the artistic element to have everything full-body, I am very fond of close ups and a more personal feeling. The stability is hard to adjust to, I use my DSLR and am used to photography, where stability is less important and the heavier camera body complicates matters.
Regarding the music - this was how the vids were done of the past and where I continued from. I'm not entirely sure of my senseis intention, he wants to show the techniques as a sort of showcase but not explain, toward the later videos (and the next coming) he starts to include more emphasis of specific movement than just completing techniques over and over. I think it could benefit from vocalization but I'm not sure he would agree - I think the hope is that people will be interested to learn and come to train here. So in a sense I suppose it is
Thank you for your feedback ^^