#17240644868488358 - SCV4 Block 4 Zip improved.
BK2 begins from savestate
bhawk 1.8.1
#16380358579335480 - SCV4 The Little Glitch That Couldn't
I cannot think of enough expletives to describe this.
(Note: Movie begins from power on. Fast forward to about frame 6400 for the relevant bits.)
#9803222163026098 - Super Castlevania 4 (J) breakable block glitch demonstration
From power on. Made on Bizhawk 1.5.1.