Considering how Jhonen’s lightened up over the last few 20 years, had Invader Zim been made past the 2010’s, this definitely would’ve been in the show. Though I love IZ for its angsty, no-affection setting, I also think if it had been much lighter (like how it was in the movie) it’d still be positively received. And speaking on the video itself, if this was actually in the show, this would’ve DEFINITELY confirmed Zim having actual feelings for Tak were more than just “learning about human affection”. After all, he is canonically a defective Irken, that alone grows that idea. Though I’ll elaborate, Jhonen doesn’t like ZATR and personally I dislike it too. But I don’t despise it
I think the reason this was cut might've been because romance doesn't exist on Irk, earth is unfamiliar to Irkens, and the whole point of Zim trying to date Tak was to learn about human affection, so how would Zim know to make a romantic gesture like kneeling and kissing a girl's hand?