DRM is a PITA. And iTunes has a monopoly on a lot of TV episodes.
On the video front, Apple’s walled garden looks attractive from the outside.Sansa just doesn’t have the same infrastructure for licensed content.
To convert m4v, you could buy Tunebite. It doesn’t actually break the DRM encryption, which would be illegal–it makes your computer think it is playing the video (at high speed) and re-recording it.
Music videos are also on Youtube, though and there are a lot of ways to save video from Youtube, including
keepvid.com , which does it for you online.
I don’t know if KeepVid works on sites like Vevo or Hulu, where there’s a lot of official content, but you could try.
Keepvid downloads Flash video (.flv), which has to be converted to .avi.
Here’s one converter:
And then you need to run the .avi through Video4Fuze, which is better than Sansa Media Converter.
Of course, DRM and lack of interoperability–making it impossible for consumers to buy something they are willing to pay for–also drive people to illegitmate sources for TV episodes and other material, which people upload to online storage like Megaupload, Rapidshare and Mediafire. Just stating that fact. Far be it from me to deprive those hardworking, fan-friendly TV executives of their second BMW.