yep saw that, was hoping someone already put it into a product of some kind
No one will support TikTok without official support from them. They could change something one day and a whole lot of work would be for nothing. I also don't know if that unofficial API would even work, if I'd designed the TikTok app it would be using a special handshake, tokens or a specific user agent to enforce only allowing streams from the official app.
as far as i can tell theres really no way to stream to tiktok seems like they only allow video uploads