Ok, here is my solution:
- Remove new Opera
- Download deb package from here: https://yadi.sk/d/KDMMF4R83DWEuq (it's my cloud) or https://get.geo.opera.com/pub/opera/desktop/
- Install Opera version 42.0.2393.94
- Download libffmpeg.so from my cloud
- Put it into /usr/lib/x86_64-linux-gnu/opera and replace (need root).
Sorry, but i'm not tested "i386" version, but "amd64" works great.