MovieStamper is a site that lets you document everything that happens in a movie. Better yet, the way it is setup, it lets you see how movies are connected to each other.
MovieStamper breaks down its content, going from the big picture to smaller: Movie -> Timestamp -> Post (we also refer to "Posts" as "Comments" - they are interchangable terms). For each movie, you can have many timestamps (you can even have more than one of the same timestamp). Off of each timestamp, you can have many posts/comments.
Off of each of those, you can place tags which then allow you to link items together. Clicking on a tag brings you to a page that shows you all items in our database tagged with that term, and then you can click on each/any of those items to learn more about what else is out there and conntected to that tag.
An additional element is the screenshot, which is a capture of the movie at some point in time. Those can be added to any timestamp or post/comment. Then tags can be added to the screenshot.
The timestamp points to a specific point in time in a movie. Movies are made up of frames, each of which are still pictures. When you view those frames quickly in a row, our eyes and brains translate that as movement. The timestamp allows us to point to a standard point in a movie, down to the second.
The timestamp that we use is made up of hours, minutes, and seconds. They are arranged as so: HH:MM:SS. Movies are technically 24-30 frames per second, so it is possible that there are actually many frames within that timestamp - not to mention that there might be some slight discrepancies in the way various playback devices show the timestamp. As a result, it is a very close way to point to a spot in a movie - but not always exact if people are using differently media sources and playback devices/software.