Here I add my favourite "gems" I treasure:
Bruckner's amazing Fifth Symphony from 1985 on Youtube:
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Lovely old articles from the 60's, when Celibidache led the Swedish Radio Symphony Orchestra ("Vi" Journal from 1966 and "Röster i Radio" from 1969). Below also BMW magazine from 1992 with interview (by same author & photographer than on the book on Celibidache issued same year):