I just tried recording some video and viewing it on my computer.
The SatHawk has two recording options, TS (which it defaults to) and PS. I had assumed that these stood for Transport Stream and Program Stream, and that the former would record everything on the transponder and the latter would record only the audio and video streams corresponding to the channel you're recording.
However, the file sizes produced by these two options are almost identical. The PS option produced a well-behaved MPEG file that could be played in anything (disclaimer: I only tried MPEG2 SD so far), but the TS option, instead of producing a .ts file as I expected, produced a .dvr file. Windows wants to play this with Media Center, but I haven't found a way to make it work.
Does anyone know what the TS option is doing? We need to figure it out, since it's the default.