I have a video file on my Canon Camera. When i diretly connect it to TV via HDMI, video quality is so high. But when i copy that file to PC and watch in on same TV screen, video quality decrease. TV screen is full HD and both connection is HDMI. How can his happen?
Note: PC use same TV as screen also.
Very simple.
Canon cameras, like most video-specific devices are tuned for image quality. Computers try to output accurate images with minimal processing ( unless you use specific tools for it )
What you see is completely natural and not an issue. It's actually pretty software/implementation specific