Nice videos.
I even saved them to my computer hoping it would help with the jerkyness. It didnt.
I think its a problem in the actual video.
When you watch the video, the description below the embedded video player reads:
"Yes, we know this video has some choppy parts, which is due to technical difficulties when the video was processed. Unfortunately you have to deal with it because it's an extremely long rendering process and we won't be reworking it. Why are we using Brightcove? To have better control over the videos, which a lot of people just downloaded and put up on their own sites. If people don't watch the videos on Pbstar, there won't be a Pbstar for much longer...Thanks for the support!"