Domenik, (sorry for the late response, I managed to see the video files just yesterday).
Congratulations,
with some videos about 15-20 minutes long, you showed a good portion of what the MS can do, satisfied the curiosity of Synthzone members and drew constructive comments and suggestions.

I would like to throw in some suggestions, please bear with me:

If you have the time, (I know it is not a luxury, since you run a company) next time pass the sound of the MS straight to the camera, since I noticed that one midifile you played as an example was the same one that you posted for the GM comparison (DANIELMIDI or something), and through the camera on-board microphone the sound was totally different and WAY BELOW the standards of what the MS is capable of.

I also think that your voice was a little low in volume, maybe doing this thing (the actions, pressing buttons, playing notes) on your own and THEN overdubbing your voice at a later time will give you the freedom to express yourself better, as you will have the time to rehearse and even record your voice sentence by sentence. Your accent, although very noticeable, did not actually deter me from understanding what was going on, and the overall "package" was much more to the point and A LOT more comprehensible than your written posts (which by the way have, improved over time, and take my word for that since English is not my mother tongue, I was just taught and my accent leaves a lot to be desired).

I believe I saw an enthusiasm in your voice, a sign that you really like this product and you believe that it is what you say it is. I liked that, since it will help you deliver the message in a powerful way, if you need to do a presentation in front of a crow of potential customers/investors, such as in a show.

I also believe that the camera was hand-held, if so, next time get a cheap tripod, it will save you the slight screen movements when zooming.

Thanks for reading,
Theodore