The Royal Scottish National Orchestra (https://philharmonia.co.uk) has a marvelous sound. They welcome donations if you wish to give and are able to help. On You Tube one can catch several of their pre-Covid concerts: one featuring excerpts from Wagner’s Götterdämmerung led by Sir Andrew Davis is especially good: https://www.youtube.com/watch?v=_bjSyn5RukY
The Czech Philharmonic (https://www.ceskafilharmonie.cz), just like so many orchestras worldwide has had to put its Season 2020-2021 on hold. Meanwhile one can catch it on You Tube in this superb rendering of Tchaikovsky: Symphony No. 6 “Pathétique” with Simon Bychkov in the podium: https://www.youtube.com/watch?v=HUMpLhLTn_4
The Philharmonia Orchestra (https://philharmonia.co.uk) is a British orchestra based in London. Among the conductors who have led it were Richard Strauss, Wilhelm Furtwängler, Arturo Toscanini an Herbert von Karajan. Here they are with Nicola Benedetti playing Vaughn Williams’ The Lark Ascending, followed by Beethoven’s Symphony No. 1, with Paavo Järvi at the helm: https://www.youtube.com/watch?v=aTAnEqH_FeA&t=2700s
Already highlighted in a previous post, the Gothenburg Symphony Orchestra – the National Orchestra of Sweden – www.gso.se/en/gsoplay broadcasts each year the best among 100 concerts held in the Gothenburg Concert Hall. The orchestra broadcasts them on demand in full HD. Listen here (https://www.gso.se/en/gsoplay/video/piano-concerto-in-g-major) as they accompany pianist Alice Sara Ott in Ravel’s piano concerto in G, led by principal conductor Santtu-Matias Rouvali.