Even worse is the fact that they sacrifice quality for bandwidth. Even if you manage to meet all their silly DRM requirements, you get poor quality video that's high definition in name only. There are titles in Netflix that have compression artifacts in 90% black frames.
Meanwhile pirates enjoy Blu-Ray rips encoded by people known for taking pride in providing the highest possible quality.
Are you watching YouTube on Linux by any chance? AFAIK modern versions of chrome and FF should not have this issue even on Linux but I could be wrong as I'm out of the loop on modern DRM.
To prevent piracy, or something.