The UI is a lot better and it now works on a phone. Brilliant moves are less buggy, users can change analysis settings, create as many variations as they want, and have both an engine and a real-time classifier provide feedback. The color scheme is also customizable.
The speaker created the tool because they were annoyed with their own game reviews and wanted a better way to analyze their games.
This video is an announcement and retrospective from the creator of a free chess game analysis website, chess.wintercat.uk. The speaker discusses the website's relaunch with significant improvements to its user interface (UI), functionality, and features, and also shares the history of its development from a personal Pygame project to a popular online tool.