What Code Logic Determins "Similar Videos" in programming
 

So im building this video script. And I want to have a "Similar" videos section right below my main video..

So similar videos depends on the category where i put the main video under (via backend)? Is that the general logic used?

Normally you would match in SQL based on the tags used to describe the video. You can probably find some great examples on stackoverflow.

I noticed on YouTube the first few recommendations are the uploaders' videos, then the rest are probably done by matching tags and possibly playlists.

You forget sponsored videos. :winkwink:

Youtube tracks every video a user visits (via cookie or ip?) and uses that data.

I never log into youtube on this computer and have had things I just watched show up as related on a fresh video.

just give up

People like you will make him actually do it. :1orglaugh

If you assign it to one category its a start and its quite easy,

tags would probably be simpler to introduce and build on though. Alot of it depends on your db structure, can a move be assigned to multiple categories?