It's surprising for me that so few people here is familiar with it.
The Scene started by sharing warez during early personal computing days, a cracker broke copy protraction and inserted credit and shared them with their friends through physical media.
With high speed internet, it became possible to share other contents like films and TV shows so some part of the Scene branched to include them. Now they include almost everything that can be distributed digitally.
However, unlike P2P/torrent release groups, the Scene still only distribute contents via private servers with a ratio system similar to what private trackers have, but there is no website. Some stuffs from the Scene that end up appear elsewhere are redistributed by some who have access to these servers, not the releasers themselves.