When I first came to Web Of Change in 2005, I had never uploaded a video to YouTube. You probably hadn't either. YouTube did not officially launch its service until November of 2005. Flickr launched 18 months earlier, and was acquired by Yahoo! in March of 2005. I started uploading photos in April of 2005. Twitter wasn't publicly available until July of 2006, though it didn't start to take off until SXSW Interactive in 2007.