Twitch captured video game players and live streamers.

IGTV stands to capture people that used stories to make short how to videos. These are the crafters (“6 steps to make Slime at home!”) and makeup artists. Instead of a few seconds showing the mascara and eyeshadow, you get a longer version that won’t mean re-watching and screen-capturing a story to try and find out that split second detail you missed. Given that instagram already gives these people a platform to build a fanbase on with photographs, IGTV has a good opportunity to win them over and take them away from YT.