How to play .bk2 videos and re-encode them properly?

[elit]

Its on this forum, in the software section, first topic.
Unpack exe for bink 2 to your installed rad tools dir, rename to bink2c.exe then run the app. You will get message that version dont match, but you can use UI and compress bk2.

Note that some bk2 files have no audio but still encoded sound track of 8bit mono. if you recoding with audio ON, you get app crash so disable audio encoding from UI for those files.