This is possibly an April Fools Day (or Aprillipäivä)gag, as it was posted on March 31st, by Finnish folks who are a few hours ahead. A group of Finnish farmers have apparently managed to get a drone to carry a running chainsaw:
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The POV footage is a little suspect, as you'd think they'd have some B-roll of that as well. And the usefulness of the rig isn't clear, as I understand that arborists and forestry workers typically remove problematic limbs nearer the midpoint of the trunk (rather than lopping off the tops) and have a whole lot of pre-tying of ropes to do first to control the fall. Still, it's fun to watch, and you have to love that the fearsome tool can be brought down by a children's balloon.