TCL connected to Onkyo TX-SR393 through ARC. Roku TV is OS of my TCL. I get Atmos surround 5.1 or DD surround 5.1 with Netflix, Disney +, etc. However YT (free) defaults to stereo. I could have sworn that it was on DD surround 5.1 for some YT vids I watched but now those same vids default to stereo. I could be wrong but don't want to focus on that. My question is, does YT default to stereo for everyone else? Is there a way around this?