sometimes they post new videos and just dont link it yet
i've seen it happen on
http://tombraider.gametap.com/
but i have not seen it happen on
http://www.adultswim.com
so it depends from site to site.
heres what was in metafile link #1
Code:
[Reference]
Ref1=http://winmed.cbsig.net/nfs/secured/g2demand/entertainment/primetime/csi/rebroadcast/ep23/csi720a.wmv?e=1190162444&h=b5fd21fdebf10dd77d511e476380f42a&MSWMExt=.asf
Ref2=http://170.20.0.42:80/nfs/secured/g2demand/entertainment/primetime/csi/rebroadcast/ep23/csi720a.wmv?e=1190162444&h=b5fd21fdebf10dd77d511e476380f42a&MSWMExt=.asf
and link #2
Code:
[Reference]
Ref1=http://winmed.cbsig.net/nfs/secured/g2demand/entertainment/primetime/csi/rebroadcast/ep23/csi720b.wmv?e=1190162444&h=52d2ccc8eadc6b7b178c14b4b4b1291b&MSWMExt=.asf
Ref2=http://170.20.0.43:80/nfs/secured/g2demand/entertainment/primetime/csi/rebroadcast/ep23/csi720b.wmv?e=1190162444&h=52d2ccc8eadc6b7b178c14b4b4b1291b&MSWMExt=.asf
it is possible to find the metafile links sometimes.
again it depends on the site.
some sites use xml files to generate playlists, some sites use javascript
run urlsnooper or other program and download all files that are loaded when you access the site, then read each one with a text editor to see if you find any playlist/metafile lists.