Hah, cool! This reminds me of an old 4chan thread where people were trying to get free file storage on YouTube by uploading video's of QR code sequences with files encoded into them. Much less useful than Txqr, but fun nonetheless.
Holy crap, I remember that exact thread, I was part of it. The OP made a program that just encodes files into a series of QR codes, but I told them that with some additional effort, encoding it into a format that would get less manged by YouTube's compression would make it a lot better.