I usually hate commercials, even though I earn some Google ad sense money myself. But some ads, for whatever reasons are pretty darn good, hilarious, creative, and I watch them to the end.
Here are two that come up a lot on Youtube lately:
I watched A-Han’s Line webtoon ads to the end too.
I’ve watched these t-shirt commercials to the end too.
Very creative!
I always appreciate ads that are fully localised and in touch with local culture and not just the foreign version with Chinese subtitles.
Those are really baichi… 
but I really like the attention to detail. Like, the MRT one even recorded the Siemens C341 trains as background noise.
I watched this to the end out of curiosity.
It’s really dumb I think.
I agree.
I get this ad regularly and absolutely find the poorly dubbed white monkey hilarious.
PXMart commercials.
This one popped up in the middle of a video I was watching. I think I enjoyed it more than the the video itself! 
Now I honestly kind of want a Nightbuddy. Or possibly, like, seven of them.
Got the second ad on a YouTube video the other day. Was so weird I watched it to the end
Oldie, but a goodie:
Someone posted this on this site a few months ago, forgot who. Old as well
Hands down the best series of commercials. You just can’t stop watching until the final segment.
Unexpected ending 
Yeah forgot about that. Definitely best commercial series ever.