"Kraid (OST Version) - Metroid" is a high quality rip of the OST version of "Kraid" from Metroid.
Jokes[]
At the beginning, the melody changes to "ryukenden" by SofT MANiAC (more commonly known as "Shuric Scan 1.99crk"), with notes from the original "Kraid" melody replacing all rests.
At 1:03, the melody changes back to normal, but with the "YOLOOO!" sample used in the YTPMV "Chadtronic Scan" by Future!Tom pitch-shifted to the music.