There are many films on YouTube about the process of Pollarding trees, an ancient process going all the way back to Roman times. In this process trees of various species are severely pruned back over many cycles to produce a wild variety of shapes. This process used to produce fodder for cattle, firewood for the hearths of peasant farmers and greatly enriched soils around the trees as well as refuge within them for creatures great and small.
This particular film in French has a spiritual quality about it that we find charming. pl
Or this other version (full length)