Samizdata - 3:25 pm on Apr 19, 2011 (gmt 0)
A static image webcam (refreshing every 30 seconds or so) is old technology but is easy to set up and uses very little bandwidth - ideal for some implementations depending on subject matter.
Live video streaming is extremely bandwidth intensive and generally requires two software servers (one to send the stream to your VPS and another to relay it from there). Free examples are QuickTime/Darwin Streaming Server (.mp4) and Red5 Streaming Server (.flv),
For video the bandwidth can be minimised by using a smaller size (in pixels) and bitrate. You will probably also need to open ports on your local firewall to get the stream out.
As this is an outdoor cam you need to consider what happens after dark.