Seems to me like they just gave up?

Vines were limited to six seconds, so the medium was a little different. That seems easy enough to change however.

The precursor to TikTik (Musical.ly) "failed" as well. I think it's because while apps of that era were able to achieve the viral moment, they failed to convert that into advertising and sponsorship $$$. TikTok, Instagram etc. have perfected that pipeline.

TikTok’s algorithm for the feed and their data science and recommenders are pretty amazing. You can tune it to show you what you like really quickly and it’s effective. Mine is tuned to old house preservation and restoration, a couple guys doing skits as blue collar workers that are some of the funniest parts of my day, motocross videos, and some dog/animal content. I’ve never liked a video or commented on a video, it’s just so effective using dwell time and they have so much data that they can give you exactly what you want and little that you don’t. There is no politics on my feed. I challenge you to get that with twitter, reels, threads, Facebook, vine… any of them

I think we remember Vine through rose colored glasses. There was nothing on vine that was addicting, other than some very famous videos, that are still treated as relics. And everyone knew about those videos, because of how the feed was organized. TikTok is way more tailored-to-the-user.

Lack of variety in videos. 6s videos limited the amount of content that could be included to the point where all videos were essentially short comedy skits. TikTok keeps you engaged by showing you a variety of different genres of video. This includes comedy, but also educational videos, sports highlights, video game clips, etc.

Add to this TikTok's algorithm for deciding what content to show you based on how engaged you were in the previous videos and you end up with a "For you" feed that drastically varies from person-to-person. This keeps it fresh and enjoyable at all times.

Youtube tries to do a similar thing by presenting you videos that are similar to your interests, but in my experience it usually trends towards what is likely "more profitable". Meaning longer videos from well-established creators to juice as much ad revenue as possible from the user.

TikTok feels night-and-day in comparison. On TikTok, I can watch a 3 minute educational video on how elevators work, and then scroll once and see 3 second video of a grown man pretending to be a duck

Right idea, wrong time. The number of people with phones and data plans capable of recording, uploading, and viewing good quality video is near 100% now.