There is a low-latency mode for twitch now that I think is enabled by default. The actual delay is reported in the "stats" view under advanced settings, probabl

There is a low-latency mode for twitch now that I think is enabled by default. The actual delay is reported in the "stats" view under advanced settings, probably coming from timestamps in the video metadata. There's third-party twitch clients I've used with the option to delay the chat to match the video using this information, which would be useful if you didn't want chat popping off to spoil you.