>>28576915>>28577280>>28577597timestamps of significance:
35:41 - Sana singing "Fly Me To The Moon"
40:24 - Baelz singing "Waltzing Matilda"
48:03 - both of them (plus the crowd) singing the Australian National Anthem, acapella
this was sana's pre-graduation farewell panel, exclusive to convention attendees at SMASH 2022 in Sydney, Australia. they didn't allow photography or video filming during the hololive panel, but didn't mention anything about recording audio (or probably forgot to)
