You can now stream in Horizontal and Vertical formats at the same time for all users on Twitch. You can reach more viewers (as if 70% of new viewers come to Twitch on mobile). You can have custom vertical formats, optimized to clip and share videos. As for all Partners and Affiliates, you can now stream 2K (1440p). They have increased the bitrates and added a server-side transcode support for eligible 2K Enhanced Broadcasting streams to improve performances. Sadly, I am not Partnered or Affiliated yet, perhaps one day soon. I will be testing out the Vertical Stream tomorrow morning at 7am CST, so come by and check it out at: https://www.twitch.tv/grantsgaming1 (M-F 7am – 1pm CST).

2K (1440p) Setup Link: https://help.twitch.tv/s/article/stream-quality#how-to-stream

Start Dual Format Streaming Setup: https://help.twitch.tv/s/article/dual-format-vertical-video#setup