this video has been made thanks to this twitter thread: https://twitter.com/closertosvt/statu...
author (twitter account): @closertosvt

☮ ☯ ♠ Ω ♤ ♣ ♧ ♥ ♡ ♦ ♢ ♔ ♕ ♚ ♛ ⚜ ★ ☆ ✮ ✯ ☄ ☾ ☽ ☼ ☀

some links (the other videos are in the thread):

music (oh my! instrumental piano):    • 세븐틴 (SEVENTEEN) - 어쩌나 (Oh My!) Piano ...  
rocket lyrics:    • [LYRICS/가사] SEVENTEEN (세븐틴) - ROCKET ...  
lotto (remix) lyrics:    • LOTTO (remix) - Seventeen (세븐틴) - Hip...  
my i (two versions):    • SEVENTEEN (세븐틴) Jun & The8 - MY I (Ch...  
hansol talking about being a halfer:    • Video  
decalcomanie (mamamoo) cover by seventeen:    • SEVENTEEN - Décalcomanie (Original: M...  

and credit to the authors of the photos and other videos :)
no copyright infringement.