I had a few big ones taken down at my house last week. The safe way!. I'm always in awe of you Arborists Dan. I like my feet on ground. The crane operator is a master as well.
It looks like they are getting it done and yes, the crane operator is a key player.
Cranes operators often know the weight of the load that is being lifted. With trees the load is hard to figure so conservative loads are a must. Then the 'shock loading' that happens removing trees further reduces the loads that can be lifted. It's pretty wild looking down from the tree and seeing the crane doing a little wiggling.
These days most crane operators and tree climbers wear radio headsets, a great aid.