YouTube Issues

First of all I tried to find my previous post about this but, I don't know how. If someone could provide information on how to do that I would appreciate it. There are several issues I have encountered with YouTube since the last major update to MacOS. I'll try to explain them here. YouTube shorts: when I open a channel and watch the first short on the left-hand side of the screen and then click on the next on to the right, it plays the first short instead of the one I clicked on. Sometimes when I first click on a short it plays audio but the video is blank or black. General YouTube: The scroll bar on my subscription list doesn't always appear. It shows for a while then it doesn't show. Sometimes when I open a video it appears to be in full screen size within the normal play window. When I go full-screen then it's normal. Basically, there are a lot of things that are not working properly and someone needs to look into what the issues are and correct them. I wish I had a friend at Apple so I could screen share and show them what is happening. It's too difficult to explain it all in this format.