I too am having YouTube issues.
I have tried 1820P 60 & 30 fps also 720p 30 fps
I have tried exporting from Virb Edit to disk then uploading to YouTube
I tried Sharing from Virb Edit to YouTube
I tried exporting to disk then using Adobe Premier Elements 11 with optimised settings to create a High Bitrate version for YouTube
All about as bad as each other.
Here is one screenshot of a pause from a video on disk
https://flic.kr/p/EmVFCm
and the same video but uploaded to YouTube
https://flic.kr/p/FjD5L4