Converting .mp4 videos to .usm format.
Converting MPEG-4 Videos directly to USM Game Videos (.mp4 to .usm conversion) should be possible, yet your options are very limited.
It appears that your only option is using the Scaleform Video Encoder.
We are not aware of any available (online) conversion utility capable of directly converting .mp4 to .usm.
A tool for converting movie files to USM files.