I think it describes the two personalities of people, one being more chill and just agreeing which is why they are saying okokok and then the other being very energetic and talking a lot which is why they are saying lalala. I might be wrong but that’s just how i see it.
it means oklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaoklaokla
if im ever given the chance i will listen to a friend just rambling on idk why its so soothing to me, my sis doesnt understand that. for me, listening to someone just ramble on is nice, its probably cuz i have adhd and i cant clear my head fully so just listening to someone can help me focus on that one thing only, clearing everything but that out of my head, at least for as long as theyre talking. this part of see you again just reminds me of that. i can also talk someone's head off if they give me the chance, again, probably cause i have adhd and my head is filled with endless thoughts. im the okokokok and the lalalalalala person lol