I have tried the tips that Brave Support has offered such as use hardware acceleration when available. This did not fix the overload on CPU, so I deleted Brave. At the time I deleted Brave I was using macOS Catalina version 10.15.3. on the date 3/24/20
Then I installed macOS Catalina 10.15.4 on the date of 3/24/20 then re-installed Brave and opened the website that was causing me issue – https://login.exeterlms.com/ (Woz-U)
Finally, I opened Task Manager and noticed the problem did NOT stop.