How to find the names of the actors in a porn video?

Well once you have some information - either actor name; studio or film title you can use this very useful site to find out more

http://anon.projectarchive.net/?http://www.gayeroticvideoindex.com/new.html?agree=I+AGREE

click on a film title to get actor and scene info... click on an actor to get full list of all work … director or studio to see full list of their movies.

There's an adult version of IMDB, too. While it's primarily focus is straight content, they also have details on older gay content. So, if you're looking for something info on an "old" performer, try checking there.

But, as slimjim notes, you need to have a starting point.

http://anon.projectarchive.net/?http://iafd.com/

If you know the guy and you're trying to find the exact film/scene, you can try one of the video-on-demand sites. Those sites have thumbnails for most of their content. Sometimes it's easiest to focus on the background (colors on the wall, that kind of thing) to help find the scene. I've used these two sites to answer questions on this forum.

http://anon.projectarchive.net/?http://gayhotmovies.com
http://anon.projectarchive.net/?http://aebn.net