Logitech C920 is great.
I have a friend using it with youcam which is smooth and the video is so clear and vivid.

Hello sumerJ, thanks. As an afterthought I typed C920 in the search box and found that a few members had purchased the webcam although it was some time ago and a few had problems with particular features of it. I also YouTubed the webcam and although it made a first appearance in 2016 or thereabouts it is still currently holding a place and a few videos explain how to set it up for maximum quality. My main concern was about using it with Youcam 8. I placed an order and expect delivery in a few days.

Quote Hello sumerJ, thanks. As an afterthought I typed C920 in the search box and found that a few members had purchased the webcam although it was some time ago and a few had problems with particular features of it. I also YouTubed the webcam and although it made a first appearance in 2016 or thereabouts it is still currently holding a place and a few videos explain how to set it up for maximum quality. My main concern was about using it with Youcam 8. I placed an order and expect delivery in a few days.

if you just want a full HD 1920x1080 resolution video, then Logitech C615 is enough, but I'd still recommand C920 because its video quality is much better than C615, as I said in previous reply, though C920 is also a bit expensive.