You may get a couple of responses here, but most of the climbers who come to the TCI Forums are recreational climbers and do not use leg spikes. Also, the vast majority are not located where there are palm trees. You'd do better to post your video and ask for comments on TreeBuzz.com, which is where all the tree cutters go for conversation.
I saw a vid in which a guy launched a throw bag over the canopy of a palm tree. He fashioned his climb line in a loose choke, around the trunk, and pulled that up using the throw line. When the line was high enough, he tightened the choke. I wonder if that may work for ya.