I also will check the BD player manual, I believe I remember it's "smart" so that one of the two HDMI outputs is soundless so you connect that to the TV and the other to the HD621 and you don't need to turn off the sound of the TV when watching a BD.
No, HDMI port 2 is
Audio only, that should be connected to the HD621 and HDMI 1 to the TV (or HDMI 1 to HD621 and from that to the TV, but then I would need a UHD722 not to degrade the picture resolution of 4k discs...)
I wonder what the up side of an audio only HDMI connection is? I think my idea of a video-only HDMI was sound...
