I know what the playable urls are, just not how to calculate them.Not sure if it helps any but URL Helper spits out playable urls, not sure how to transform that to OV though.
URL Helper - Find URL, Get URL of MMS, RTSP, Capture RTMP URL, Sniff stream URL, Get Link of FLV, MP4, MP3, WMV, RM, ...
Page: FAIL Nation: Hey, Let Me Try FAIL - EPIC FAIL Funny Videos and Epic Fail Funny Pictures
Page: Fan Sing-A-Long FAIL - EPIC FAIL Funny Videos and Epic Fail Funny Pictures
However, I stumbled on some javacode that does the trick (thx jdownloader), and trying to get that working
Edit: Argh, after a lot of time converting/debugging java to c#, it appears that the java code itself didn't work