🔝 uhd calibration video 4k test pattern 20min. with ambient music. tv test video 4k. Published 5 years ago • 152K plays • Length 20:38 Download video MP4 Download video MP3 Similar videos 30:11 🔝 4k test pattern uhd 2160p - 30 min. test card calibration video. tv test video 4k 3:43 calibrate your display like a pro 5:01 4k television calibration in 5 minutes