Don't forget that the m68k line of CPU's are very old and run at comparativly slow clock rates, I mean the 060 only runs at what? 66MHz? And AFAIK the 060 was released in about 1992. The 020 in about 1984. They were really good CPU's in their day (even if FPU performance did drop off a bit) but I'd be surprised if they'll run MPEG 2 plus an operating system, even on something as good as an Amiga.
well that's my 2 cents anyway.
srg