Hello, here's a quick round up of available audio or video resources on this year's play :

• Coming soon : https://www.shakespearesglobe.com/whats-on/twelfth-night-live-stream-2021/ 
• David Tennant as Malvolio in this BBC Radio 3 2012 recording
• Professor Emma Smith, from Oxford, on Twelfth Night in her "Approaching Shakespeare" series of lectures
• A scene by scene analysis in video clips which is actually quite helpful
• The RSC's Learning Zone on the play : useful for seeing video clips & stills from past productions
• The National Theatre 's original production with Tamsin Greig as a great Malvolia (a few clips); and below an interview with Greig herself :

• Another very short gem : Judi Dench reprising the part of Viola she played to great acclaim in... 1969, with Benedict Cumberbatch as Orsino :