I finally reached the result I wanted for my video. Some improvments are needed on the quality of the video but I cannot invest in a camera for the moment (film with Iphone).
Here is so two videos. I am still working on the particles effects in SeeMusic, really a lot of possibilities and I must find THE good one :)
Hope you'll envoy: https://www.youtube.com/channel/UCgH6IXk7JM1p9OwhFUXxFIg