The "Android Head Units" sub-forum is the gold standard for finding firmware and custom ROMs.
If it hangs on the logo for more than 15 minutes, the firmware might be a mismatch or the file was corrupted during download. Final Thoughts yt9260ver11 firmware free
Because these units are manufactured by various factories (GongYue, XYAuto, etc.), there isn't one "official" website. However, several community-driven hubs host these files for free: The "Android Head Units" sub-forum is the gold