Does the Wink News video say anything about what's in the motion? I can't play the audio at the moment.
ETA: Certainly I don't see any point in CWW trying to delay sentencing so he can go back on the deal--obviously if he goes back on the deal before sentencing he wouldn't get the deal at all. Also, his testimony has already been recorded and transcribed (and filed in court as a sealed exhibit according to what we learned at MS's last bond hearing), so no one is waiting to see what his story will be.
All it says is that CW's attorney filed a motion to delay CWW's sentencing in Siever's case until after the other two cases are over. It was literally a 25 second video.