[playogg-discuss] "No derivative" Licenses

[saulgoode]

I am interested in publishing some video tutorials and am trying to  
decide upon a license. I basically want to allow for free sharing of  
the videos as long as they are provided in unencumbered media formats  
-- no transcoding to proprietary formats, and especially no  
publication of proprietary-encoded versions by YouTube or other such  
sites.

Neither the Creative Commons ND (no derivatives) nor SA (share alike)  
licensing terms support my goal because they allow for transcoding of  
the content to other, proprietary, formats (though they offer an  
option to exclude the addition of TPM/DRM). I do not care if my  
content is used commercially, or whether derivative works are based on  
the content itself; however, I do care that it should be provided  
using only unencumbered media formats (but otherwise freely  
distributable).

I realize that I could create my own licensing terms, but I was  
wondering if there might not already exist a license that generally  
supports such terms. I would also welcome feedback on how such a  
license might be approached (assuming one doesn't exist) plus any  
general commentary on the viability or morality of such licensing  
anyone wishes to provide.

Regards.