It was originally unlisted, but was later removed by YouTube for violating their policy on nudity/sexual content.
The video is pretty much the same as "o", with the only difference being the different morse code:
----- ..--- -.... --... -....- -.... -.. .---- ----.
Which translates to:
This is the second half of the Super Mario Maker course ID seen in "o". After watching both videos one can piece together the full ID, 0F2A-0000-0267-6D19, which leads to the course Clear this Course! by Le Ruse Bird.
Hidden in the corner of the course are invisible blocks spelling "Steins;Gate", leading to the rip "Ringing -Reunion- - Steins;Gate".