If you want to capture the airsoft sniping action via the scope, here is one way of mounting a smartphone to the scope. Mach Sakai reviews this product that can be ordered at Amazon.jp. With smartphones' videos now at full HD or 4K resolutions, you can capture high quality videos without needing any other action cam if you are on a budget. We would recommend this for DMRs rather than bolt-action rifles as it tends to get in the way when you pull bolt.