Free Opera streaming of some of the most prestigious performances in the world, along with interviews and articles about performances
https://www.metopera.org/user-information/nightly-met-opera-streams/week-3/
https://www.operadeparis.fr/en
https://www.digitalconcerthall.com/en/home?a=bph_webseite&c=true
free access to digital concert hall: Berlin Philharmonic