This started as a personal project which went viral on TikTok (over 1m views on a really bad video I made). I then spent a few days frantically building this out as a Chrome extension to let others experience it.
It grew like crazy, with 30k downloads in the first day and lots of TikTok users making their own videos with their results. I had never had something go "viral" this fast, it was the first time I had to turn my notifications off.
Not going to go into detail about how I built this one because Netflix definitely doesn't want you to do this, but let's just say we got creative :)
I ended up selling this eventually.