Prelook on different sites

Hi, I really like brave but I miss some things from the old browsers like on different video sites (you know what I mean) if I hower the cursor on the video it only shows on picture and not a sllideshow (the preveiw of the video). There are some sites like where there are no images. I really appreciate the good work and keep it up :)) (sorry for the bad english i hope you understand it)