This video from the USA is called Sawflies in Montana.
From the BBC:
A tiny insect species has been discovered in the UK for the first time.
The sawfly, which specialises in living on birch trees, is extremely rare within Europe, previously being known to live only in Latvia and Finland.
However, an entomologist has found a single specimen of the species Nematus pseudodispar living in a woodland estate in Scotland.
See also here.