Hi,
I am a editor of graphic contents and videos, I have worked for product videos and posters for colleges and NGOs. I have been the chief designer for them as well.
I can assure you a high Quality and appropriate videos as per the requirement. Since your requirement is of s product demo there are few points I can pitch in for it to be natural and pleasing.
Hire me to have your product all through the network, we shall discuss further on the work. I can show you demo and sample video. Pay only if you are satisfied.