Solved. GUVCView did the trick without having to do anything, right out of the box for latest Raspbian OS. Amazing. I was going almost nuts trying to get my Celestron microscope to work with Fswebcam using my custom settings. GUVCView has a GUI interface with a live view mode that allows me to capture still images or record video at 1080p. Just had to adjust my OLED TV frequency to 60Hz and was good to go. Throws one error multiple times on linux console but image looks perfect, just have to ignore it. It's more than Enough for me at this moment. Now time to do some experiments with libgphoto2 to make work my Lumix DC-GX850 DSLR and Canon rebel T4i DSLR cameras which currently supports (Image Capture, Trigger Capture, Liveview, Configuration) to function as webcams on Raspian Buster.