A commercial drone license is required to make money from your footage. Here are a few resources that will help you pass the Part 107 quickly and stress free.
How do I pass the Part 107 and become a Drone Pilot?
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FAA
3 Reasons to Get Your FAA Drone Pilot License ASAP
Should you pay to get an FAA Part 107 drone pilot license when recreational flying is completely free? This post offers 3 reasons to take the Part 107 exam and obtain your pilot license as soon as possible.