1. Three important elements for good photo and video are sound, light, and stabilization. 2. Sound quality is important, and microphones on smartphones and DSLRs are typically small and don't capture high quality audio. Getting the microphone close to the subject improves sound quality. Shotgun and lav mics are good options. 3. Proper lighting is also essential for video, similar to photography. Natural light is best unless additional video lights are used. 4. Stabilization is the third key element, as shaky video is difficult to watch.