· If the capacity of a single video file is large and 50M, the video file is too large
· There may be too much noise on the screen. (For example, thermal noise may occur when the device is not properly cooled.)
· If the screen shows a lot of noise, make sure the device is cooling properly or try Upgrade the firmware version of the device . If there are still some noises after the upgrade, it may be a hardware problem. Please contact the seller to repair the device.