How do you watch this...???

[im]

www.pistonheads.tv/clip1183

I right click and download the file which gets saved by default as an MPA file. I have Real Player installed but it says it needs extra components to play the file. It connects to Real and comes back with the message "no components found".

I thought all files U/L had to be MPG or WMA or am I wrong.

I've tried to change the file extension to MPG (just in case) but that doesn't help either.