@pinportal
Hi!
There's an even better way:
curl -L -O https://github.com/iteufel/nwjs-ffmpeg-prebuilt/releases/download/0.47.2/0.47.2-linux-x64.zip
unzip 0.47.2-linux-x64.zip
sudo mkdir /usr/lib/x86_64-linux-gnu/opera/lib_extra
sudo mv libffmpeg.so /usr/lib/x86_64-linux-gnu/opera/lib_extra
Opera will automatically use the version in lib_extra and the mod will survive opera upgrades. So you'll only need to do this once.