?????

Hello , I recently installed Ubuntu 16.04 and with Opera as the primary browser . It happens that the browser has presented failures especially when loading images and video sites , the images are with parts missing and soon become normal. In youtube videos also the same thing happens . In Firefox browser I use normally flawless, the chrome features the same mistakes , but much less , but the Opera browser are many. What is the solution to my problem ?
Heeeeelp!!