yttwthmode is a Chrome add-on developed by maquinas that brings a Twitch-like theater mode experience to Youtube livestreams and archives. With this add-on, you can change Youtube's theater mode to emulate Twitch's, providing a more immersive viewing experience.

The main feature of yttwthmode is that it displays the video in the whole window, similar to Twitch, with the chat panel on the right side. This layout allows you to have both the video and the chat visible at the same time, enhancing the social interaction aspect of livestreams. Additionally, when you shrink the screen to half size, the chat panel automatically moves to the bottom, making it easier to follow the conversation.

Overall, yttwthmode is a useful Chrome add-on for Youtube enthusiasts who prefer the theater mode experience of Twitch. It seamlessly integrates with Youtube, providing a more immersive and engaging way to watch livestreams and archives.