The ones that stay at connecting the whole time are probably spamresult (fakes). If you search for a popular movie using the name of the movie tou will often get thousands of fake results.
As for movies not playing there can be many reasons. You may not have the right codec installed for playing it or it can be a bad file. Search the forum for codec or better yet download and install this handy tool
http://www.softpedia.com/get/Multime...ed/GSpot.shtml
Just install it and use it to identify your videofiles.
It will tell you if you have the needed codecs installed
Also before downloading a videofile you should check it with Bitzi
Right-click on searchresult choose Advanced>Lookup File With Bitzi
If it says bitprint not found and search says many hosts have this file then it's most likely a fake file