Cosmo's Cosmic Adventure E3 any% -  

Cosmo's Cosmic Adventure: Forbidden Planet Episode 3, version 1.2; DOSBox version 0.74 using 20000 cycles. This game fits between long load times at auto (3000) cycles and not detecting the sound card on max cycles, so 20k is used as a compromise. Original video date: 2016/06/08
Timing starts on the first frame of a darkening title screen, indicating "Begin New Game" has been pressed. Timing ends on the first frame of the end cutscene.
Dunno if I'd even call this a particularly good run, but this episode is also far and away the most challenging to complete. Health management might seem important in the others, but here you're expecting to get hit in exactly the right places for a majority of the run. The factory levels are crazy too, mostly on the platforming. It's my favorite episode, but dang it's a toughie.