This is not a recommended method of rigging according to professionals because of the potential danger from not knowing how strong the tree is, etc. Aerial Empowerment is not liable if you attempt to rig from trees.
I personally rig my apparatuses (Aerial Silks, Hoop, Trapeze, Hammock, etc) from trees.
AllI use is:
*Climbing/Arborist Rope: A minimum of 60ft or longer, high tensile strength rope (Rock climbing rope, I personally am using an arborist rope which I prefer for trees because they have a tough outside layer that is abrasion resistant which is ideal for trees).
*Smaller rope: tied to one end of the thicker rope, this one should be lighter weight to throw over the branch, trust me, you're not going to want to throw over just the thicker rope unless you don't have to throw very high.
*Heavy Object- attached to smaller rope to throw over the branch. Should be heavy enough that it will come back down to the ground on the other side of the branch so that you can grab it and pull the rope over. You can use scrap metal, horse shoe (though I don't personally recommend incase it gets stuck on a branch.) You can use rocks, one of my students used her shoe, etc just get creative but beware whatever you throw can potentially get stuck in the tree.
I had a video but I had quite a few professional riggers get very upset about my method so I took it down. It is not the safest method to rig according to them, but I personally have been doing it for over 3 years and have not had any problem, failures, or have harmed any trees in the process they are all still growing and blossoming every year. Note that if you leave a tree tied up over time it could kill the tree so NEVER leave the tree rigged when not in use.