Hellow guys, Welcome to my website, and you are watching BROADCAST 🌐 SIGNAL CALIBRATION VIDEO 🌐 TEST PATTERN | DISPLAY STREAM (1 hour long) - 4K 16:9. and this vIdeo is uploaded by Xponentialdesign Tutorials & Video Marketplace at 2021-02-10T09:45:04-08:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.