YAAAY!! Another person drawn into the circle of these fandoms XDD
I've been a fan of BTS pre-debut and highly anticipated Seventeen's debut too but I have to admit that I liked BTS way more mainly cuz of Kook and Rap Mon xD Oh and yeah, been a Got7 fan since the day of the debut! :D So I can't believe some people like you are finding out bout them just now!! LOL
If you haven't done it yet, definitely check:
Got7's "If you do", "Girls girls girls", "Stop stop it" and "I like you"
BTS' "War of hormone", "Run", "I need you", "Luv in skool"(short but amazing) and "Dark&Wild comeback trailer"(which is only by Rap Mon but also freakin amazing)