Thank you for a prompt, knowledgable response. On your recomendation, I may well consider purchasing 4K downloader, if I can overcome the remaining video player issues:- I would agree that watching 4K 360 feels like watching blurry 2K in VR180, hence my interest in pursuing the best video clips I can find the Quest is capable of, and that you appear to have a solid technical grasp of understanding. DeoVR's zoom and tilt (and manual override of file format settings eg SBS, T&B, 180, 360 etc) are fantastic (CUBE mising format excepted). DeVR advertises it's limited to rendering max 5K. However, 1) Although "Whirligig" video player looks exciting (and cheap), it looks like it probably only work with Rift (unless you can confirm that sideloading it on a Quest-1 maybe is known to work with some kind of PC renderig connection, I'd willingly try). So the way I see it, I may be till ultimately limted to making the most of DeoVR player, despite knowig you're managing to possibly render 12K or maybe 16K resolution mp4 video files, on a lower pixel count Oculus Rift. 2) 4K downloader in it's default seting would not download anyhting above 1080, without setting "Smart mode" probably limited by my 30Mb/s internet connection, so I don't know what you mean by manual mode, for Pete's sake! LOL. Please explain, if I missed some setting? "4K downloader", sadly appears limited to the max of 8K 60fps option, despite my trying to apply it to the only two youtube 12K 360 video clips I could quckly search for. (PS I notice some youtube sites "4K downloader" downloads are in mkv file format, regardless of my mp4 setting in "4K downloadeer", and proved useless to try converting through VLC for Quest it lost the 3D draggable PC-view, that did play fixed monoscopic view in more detail on VLC PC player, disappointingly no longer a 360 view). Look forward to hearing any further thoughts?