Those first two videos are not editors for NES Bomberman. That person was creating their own Bomberman game and showing the development process (the videos are titled with "Fase Desarrollo" meaning "development phase").

If you're looking for a way to hack Bomberman ROM's, I think you'll be waiting forever. ROM hackers don't really touch Bomberman games all that much except to translate them here and there. Those who have the skills needed to create those kinds of tools don't seem to have interest in Bomberman, and there's no great demand for this sort of thing so nobody has bothered to try.

People have made a lot of hacks of NES Bomberman if you'd like to try them here. But the original Bomberman literally just has the same map layout in every level; there's no way to really change that without greatly overhauling the game, so most of these are just graphical hacks or harder variations.

I vaguely remember Hyper Bomberman but I don't remember if it's good.