Howto "download"/archive website video on N900
 

Like firefox on your desktop, microb browser stores flash video in a temporary directory.

.~ $ ls MyDocs/tmp/Flash*
MyDocs/tmp/Flash6JwHDO

To keep a video (e.g. youtube) after it finishes streaming to device, leave the browser window open and switch to terminal, then just copy and rename the flash file you find there

.~ $ cp MyDocs/tmp/Flash6JwHDO MyDocs/.videos/Whatever.flv

This lets you keep good videos, and playback high definition video that doesnt play in browser!

have fun :)