There is no 'operation manual' for the UT codec.
This download site has the version history and full changelog:
Using the UT codec is no different than using any other media codec.
You install it, then your applications can use it to 'code' or 'decode'
media files (in the UT codec's case, .avi files).
(in the UT codec's case, .avi files).
On Widows yes. On a Mac, they'll be MOV files.