The film from last year is an Mp4 format.

The three from this year are .MOV format -

Both of these formats are read by Apple QuickTime. go to www.quicktime.com and download the 'free' version of the software...

The only major thing you cant do is 'save' streamed videos you watched on the web without downloading. And you will get an advertisement to upgrade every time you launch the program.

The download, is actually an additional download installer tool.
If you have broadband, you should be up and running in about 5 minutes. If you have dial up, um... it will be a 'bit' longer.