FlameofWesternesse has made this terrific short film, which catalogues some of the memorials placed throughout Azeroth in honour of World of Warcraft players who have passed away during the game's tenure.
Maybe you've seen them and wondered what they were for, maybe like me you've barely played the game and had no idea it could do stuff like this, either way it's a surprisingly moving video.
A Tribute to World of Warcraft Memorials [YouTube]