The 360° video was fun.
Downloading it normally gets a video all cut up weird tho (from Youtube's cubemap algorithm thingy).
Long story short. I used 4 hours to get a video playable on PC.
(Works with GoPro VR Player, Kolor Eyes and GOM player for me. But VLC player crashed like crazy, sad)
Download (~350mb):
http://www.mediafire.com/file/70485aac7tk6noj/Morning_Musume18_-_Are_You_Happy_360.mkv/fileLong story.
Downloaded 80 res/versions of it withJDownloader / VideoDownloadHelper add-on. Failed.
Downloaded a bunch of 360° players, and questionable shady software. Failed.
Read up on youtube-dl. Hope.
Cubemap. Bad. Equirectangular. Good.
user-agent "". answer.
Why webm. Merge into mkv... techy words ^&%&%*&...
Done.