Soul touching songs

strange music I 'd say strange vocals, is it related to videogames?

If you are referring to a nightcore stuff, then NO.
It originates from some Noweign band, but it is actually a style that speeds up dance, trance, techno and industrial compositions.
But, you can speed/pitch up almost anything.
It is supported by random people who actually appreciated manga,  wanting to make their favorite characters sing popular songs.