Found https://chrome.google.com/webstore/detail/visual-history/nkckokcpjekkokllfplejfkocaikmnml?hl=en https://chrome.google.com/webstore/detail/visual-history/n

Found https://chrome.google.com/webstore/detail/visual-history/nkckokcpjekkokllfplejfkocaikmnml?hl=en https://chrome.google.com/webstore/detail/visual-history/nkc..., but it's a bit less awesome because it doesn't save the previews :) Edit: also found https://chrome.google.com/webstore/detail/histree/lngppkkhjifheiegfeloipgaeomjfgbf?hl=en https://chrome.google.com/webstore/detail/histree/lngppkkhji..., updated in 2012 but it's much closer to the thing in the video. Will continue searching :P