It could depend on the video card you are using…
I can tell you what I use with a Blackmagic Intensity. I ask for “Apple Pro Res (Proxy)” or “DNxHd”. They will be very big in size (more then 10 GB for 90 min ), but Nuendo will love it. (It looks like the higher the compression the harder for the DAW).
If I have to get the picture via download I ask for H264. But even then it should not be too compressed (will still have 3-4 GB). If i use H264 with under 1 GB for 90 min Nuendo/Blackmagic will not like it. I will then turn it into a “DNxHd”.
That is on Mac. Don’t know if it is the same on PC.
Oswald