Holy moly this is incredible! I'm not usually one to watch videos here, but this one was worth it (and pretty short).
I'm amazed that he built a whole new browser to go with his OS.
Glad you enjoyed the video!
Just to be clear, while I started the project, it's since been hacked on by hundreds of people (we're well over 500 contributors on GitHub) and it's by no means a solo project anymore! https://github.com/SerenityOS/serenity