Thanks Rassi,
Signal is good, the issue is not coming from a poor signal. I will try a powered USB hub, hopefully this can solve.
Cheers
I´m not sure if it was that, which helped me with Sundtek sticks, after powered hub DVB-C has been stable, drivers has also updated so i do not know if hub was the key or not.
I do have second Sundtek connected also as DVB-T, but i havan´t used that much.
I did have same kind of issues with picture as in your video.