What Code Logic Determins "Similar Videos" in programming

[lakerslive]

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?

[shake]

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

[Tube Ace]

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

[Zeiss]

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.

[- Jesus Christ -]

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.

[mychemicalromance]

just give up

[Zeiss]

just give up

People like you will make him actually do it.

[foxyflesh]

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?