Hmm no dice.
Here's the filefront if it helps to help me at all :/
http://www.filefront.com/PhurionPracticeClipsv2rar/;12736188;/fileinfo.html
You need to extract the video from that file first using UnRarX. Then, depending on the resulting video format, convert it to MOV(Apple Intermediate Codec) using MPEG Stream Clip.
Ok I used UnRar so now I can at least watch the clips. I'm not sure what you mean on the second part. I went to an individual clip and manually changed it to .MOV and it changed successfully but I still can't open it in iMovie.