Tady ti tezko nekdo poradi.
Bud nikdo operu nepouziva, nebo kdyz pouziva tak ne kvuli stahovani streamovych videji.
Hledej tady
https://addons.opera.com/cs/extensions/details/you tube-downloader-2/?display=en
https://addons.opera.com/cs/extensions/category/en tertainment/?order=popular