Here is my problem
it's the view of a canon on best quality, it renders the same way. Original video is perfectly smooth with full HD quality, saved as .avi. I tryed to change it to mp4.
On my second PC it accualy looks good. I think it might be codec issue, but I don't know which one.
Windows 7 64-bit
Intel(R) Core(TM) i7-3770k CPU 3,50GHz
16 GB RAM
It looks to me like you're not interpreting the footage correctly with regard to fields and interlacing.
See this to understand what I'm referring to: