Question about Sony UBP-X800M2

Yes, I also have this combination in operation. It works great, including remote control with the Samsung Universal Remote.

I am not a specialist, but nowadays the connection is preferably made via HDMI cable, and is basically independent of the manufacturer of the devices. There are differences in HDMI specifications over time, but if the TV is not too old, it should generally work. To put it bluntly: the picture always comes, some sound too, but whether the TV can use the capabilities of the Bluray player (resolution, format, surround sound etc.) depends less on the HDMI cable connection than on the TV itself ...