I think all the major points I want to touch on already got mentioned but I still want to share my thoughts in my own words.
1. Decent scenario. Not the most important thing in the world but having just a little bit of backstory helps me feel more immersed in the video.
2. Character choice with dialogue to match. Since JOIs are glorified slideshows this is a no brainer. I’m not expecting the greatest writing in the world from people who want to beat their meat but having some decent writing that matches the character (a lot of creators seem to forget this part) goes a long way in my eyes.
3. Image choice. Also a no brainer. If you’re writing a handjob scene then use handjob images, a paizuri scene then use paizuri images. It’s a rather simple concept.
Regarding A.I there’s no reason 99% of the images used in a video should be A.I if you’re using an extremely popular character (it’s kind of absurd that vids of HOYOVERSE characters have all the images be A.I. creators can’t possibly be THAT lazy.) If you for whatever reason have to use A.I at least use refined ones that don’t have that gross rubbery look to them.
4. Instructions. It feels like this part is also widely neglected. Stroking at different paces for 25+ minutes isn’t all that interesting mix it up a little. Throw in some head strokes or ball play a few edges here and there (maybe a few more if you’re making an endurance video). I feel like there’s way more beyond just stroking fast but nobody bothers to experiment.
5. Pacing. It hard to explain this one but lingering too long on particular scenes makes the video really rough to go through or rewatch. There needs to be some sort of sweet spot of sorts.
6. Interactivity. Only really necessary for a few JOIs (namely roulette videos) but having little tasks do during or between rounds. Outside of roulette videos I enjoy videos with multiple routes with each route having its own dedicated fetish. Gives the video some rewatchability too.
I went on for quite a while but I really wanted to get my thoughts out especially since the database is just full of creators who pump out low effort videos that just want to make a quick buck.