You are talking about this video - https://www.youtube.com/watch?v=UvEITdAEnxE
And it is about this firmware - https://forum.snapmaker.com/t/custom-firmware-for-snapmaker-u1-enhanced-features-webrtc-camera/
OpenPrintTag hardware specs are not released. So it is not possible to tell with certainty what is or is not compatible with it.
By the looks of it, openPrinTag is using NFC tech. Where U1 has RFID (mifare 1k tags) they are not compatible. Unless you swap upgrade the reader on U1, install drivers to the Linux head, and make it all work with klipper.