This video is about a honey buzzard excavating a wasps’ nest.
The report says about their research on food for young honey buzzards:
A total of 503 prey animals were collected, by far most of them in or below the nests. Approximately 4% of the prey were birds (nestlings or recent fledglings only), frogs and slow worms were something more than 1% and (nests of) bumblebees almost 2%.
The rest, 92% of the prey, consisted of wasp honeycombs (Table 7). The annual variation was particularly small: the proportion of wasps ranged from 90.8% in 2008 to 92.7 in 2009.