Live from the account "See Jackson Hole" on YouTube, who has many live streams from around the area (presumably for promotional purposes). This feed has randomly taken off, most likely due to a now-removed reddit thread. The chat feed moves too fast to have a conversation, and memes are being created by the otherwise mundane activities going on in the square, like the repeated sightings of a red truck.
http://www.theverge.com/2016/9/6/12814630/jackson-hole-livestream-watch-youtube-street-web-cam

See all Jackson Hole Webcams here – http://www.seejh.com/live