TK-949 said:

Yeah, sure.

The PT deleted scenes were all remasered and pimped up with special effects, soundeffects and music and the OT deleted scenes are treated like the bad step child. That's just f*cking great. With our luck they're also in SD.

Stuff from the cutting room floor wasn't as highly regarded when the films were made like they are now. It's probably a miracle any of it has survived at all.

Things were different when the Prequels were made, as deleted scenes now had value as a DVD extra, so they were treated with more care. And in the case of Episodes II and III, they probably had dozens of copies of the digital tapes used.

The deleted scenes from a classic like Forbidden Planet only seem to survive as a VHS copy of a workprint. Criterion and later Warners haven't been too specific about the source of that, but it's safe bet a hard core fan rescued the footage originally, and the workprint no longer exists.