Thanks to guys at internettablettalk, I noticed that youtube had changed the way video files are referred on the page source code. Thus, uktube stopped working until this problem had been fixed. I was just able to fix and test it a few minutes ago and I wanted to let you all know that the problem has been fixed and there is a new version for you to download.
So, once again, thanks for letting me know of the uktube bug. UKMP 1.62 only fixes uktube bug in downloading youtube videos. So, don't expect any fixes related to ogg files.
It seems that ogg installation at the moment is missing ogg demux for some users. I'll try to get oggs working again in ukmp for the 1.63 release some time next week
EDIT: LINK FIXED