I usually get my videos of games (trailers & developer interviews) through GameSpot
The Internet Archive’s Game Videos Archive was set up to archive all kinds of rare or difficult to source, legally downloadable video files relating to videogames.
Whether it be EPKs (electronic press kits), speed runs, machinima, and a multitude of other replay and gameplay files, the Internet Archive is delighted to present this collection for archival posterity.
Any suggestions of other places for video documentation about games (I’m interested in gameplay, narrative & cross-media elements and not technology), old and current?