mvies,media player
 

when I try to view the movie I downloaded I receive a message in my Media player ( Classfactory cannot supply requested class)
And I can't view it. What can I do or what do I need to view them (movies.
2- Also how can I burn those movies?????

It means your video app doesn't have the correct codecs to play that type of movie format. Since u haven't told us what type of app you're using it's difficult to make any suggestions other than to get an alternative one. For example VLC is free & will play most (not all) video formats incl dvd & vcd. Found here: http://www.videolan.org/ Your 2nd Q. There's plenty about this on the internet if you search for it. One is http://www.videohelp.com/ & another here!