If the file ends in a strange string (like .MP4.LE instead of just .MP4 ): Right-click the file and select .
File names like this use "dot-notation" to pack information into a small space: : The name of the TV show. S03E04 : Season 3, Episode 4 ("Fine Young Cannibal"). MP4 : The video container format (widely compatible). You have requested : Boston.Legal.S03E04.MP4.LE...
Keep the S03E04 part intact so the software can "scrape" the correct episode title and thumbnail. If the file ends in a strange string (like