Okay maybe I miss understand.. if you film with iPhone and place it on YouTube and your video is monetized, you don’t need a permit, but if I fly your drone legally and post to YouTube and are monetized you do need the 107, and permit?
You can't legally fly a drone in a National Park without a waiver in the first place. Handheld casual footage - not an issue.
Read the excerpt from the NPS docs in post #7 for how this is applied.