There were a huge number of smaller pivots that didn't make the article. They didn't go into the period where JTV had its own internet talk show, for example. There was also a ton of strategic pivoting behind the scenes concerning the business model and revenue -- but that's not the sort of thing that's going to make a FastCompany article.
The most amazing thing about JTV is that everyone just kept going, even when the circumstances made you want to roll over. Twitch and SocialCam are an object lesson in tenacity.
We had a lot of ideas / pivots that were released or almost released and never made it: leaving video messages for your friends on Facebook (when the first platform came out in '07), a live streaming API, a gaming site for live video streams (yes, we actually pivoted to TwitchTV twice), CamTweet (a way for you to share live video on Twitter), and more that I probably can't remember.
As Tim noted, props are due to the JTV team, who stuck around and kept building things where reasons to continue were scant, which was often.
Moderators should note that I'm commenting on a disparity between the article contents and its title. If you know that there are more pivots that's all fine and dandy, but the article only mentions 2 and that's not enough not warrant the "many" in the title, imho.
Props to Justin. This guy carries himself like a true startup veteran despite being only 28 years old. He has a level of tenacity that will make him succeed 9/10 times regardless of the idea, that's what differentiates Justin from rest of the wantrapreneurs.
Startup stories where things don't go as planned but the founders find a way to persevere anyway (like Justin.TV) are way more inspiring to me as an entrepreneur than the overnight successes of companies like Instagram, etc.
Kevin Systrom interned at a couple of high profile startup pre-Burbn too. Pinterest had a product called Tote before Pinterest so theres a not insignificant time of preconditioning there too.
Does YouTube have any real time abilities? (Genuinely don't know). Photos are a snapshot of the past, but the time between shooting and sharing can be seconds; videos that aren't streamed in real time can't be shared until they have finished - so any video is therefore at least as old as it is long.