On OS X 10.9 Macbook Pro 2012 model any youtube page shows a video larger then the screen size and must be jogged up/down to view
Could you check if the page zoom level has got increased by any chance. Click on the kabob menu(3 bars on the far right of the tabs bar) and see what the page zoom level is set at? Also could you paste the details from about:brave so that we have suficient information of the brave version that you are running
my goodness! you are right! I had never heard of this. Thank you!!!