The C920 I also do not really like (2 stars).
The C930e but at least has a wider viewing angle, which is important for my purposes. This camera can be the H.264 stream also not readily use (Windows 8 is now times a failure, and I'm not even sure if it is so). That should at least be in the description of the operating system you need to utilize the full features. She also has another mistake, which was corrected in the C920 more or less (autofocus setting). Thus, I give her even 2 stars.
Update:
I regret to deduct even one star because I found out that this is a VFR (Variable Frame Rate) is the camera, which is not the C920. That is when you record with codecs or containers that do not support VFR, you get severe problems in the form of jerking or sound represented much sooner or later after a while as the associated images.
Now I have just made the lens of C930e on my C920, which is fine with some tinkering, and am happy at least with the C920 now.