Next chapter, now begins

In the Korean comments

The comments connect the clip specifically to gaming. One reads, in translation, “I thought Hearts2Hearts would collaborate with Honor of Kings, but Arena of Valor isn’t bad either. I hope they get more chances to work properly with TiMi and Tencent,” while another says it feels like playing a game.

What the words mean

“중독성 쩔어” (jungdokseong jjeoreo, “It’s insanely addictive”) literally describes the “addictiveness” as extreme; here it means the song is ridiculously catchy. It is highly casual, emphatic slang.