Welcome to VodChat.
VodChat is a tool that lets you watch a YouTube video and see the chat that spoken on Twitch at the same time.
At the moment not many historical videos have been given their chat times, so look for the "Chat Enabled" badge top right of a video in a playlist (not on the playlists below).
This will improve over time as more chat offsets are added!
Sorted in "Most recent" first, the date shown is the broadcast date for the most recent episode in that playlist.