There have been a couple of challengers that failed, now however YouTube is getting very serious about streaming, and they are well on their way to reach parity

There have been a couple of challengers that failed, now however YouTube is getting very serious about streaming, and they are well on their way to reach parity with twitch. Twitch recently weakened a policy where partners weren't allowed to stream on other platforms - probably because it is feeling the heat from popular streamers moving over to YouTube. Most streamers already have their live content on twitch and their gods and other video content on YouTube, depending on how the revenue from either side stacks up, they are enticed to switch over.