I'm unable to play any videos from search results, or the watch history feed.
The reported error is "Unable to the video. No URL".
Attached are all the log files.
Note that I deleted them all before trying to reproduce the problem.
Here's how I can easily reproduce the problem:
1) Select YoutTube
2) Start a new search
3) Look for "XTC Dear God" (for example)
4) Try to play the first entry (or any other, for that matter)
(see attached image)
Please let me know if I you need anymore information.
My guess is that you haven't installed URLSplitter. Download it from Extension installer and you should be good to go.