OK, I gave the Tinylab team a week to respond and they didn’t, so here’s my (possibly wrong) answer. After digging around on eBay for a while, it looks like you want to search eBay for “hx8347”. Hopefully the first item listed resembles the one in the Tinylab video. The eBay listing points to a web page that apparently has a library used to interface with it, and example code. Again, I haven’t bought this item so I’m not 100% sure it’s what’s used in the video, but it does look a lot like it.