How to Use a Nikon D3400 as a Webcam or for Live Video Streaming
Nikon D3500 mic modification*external jack * - YouTube
Digital Camera External Microphone Compatible with Nikon D3400 DSLR Digital Camera External Microphone Vidpro XM-88 13-Piece Professional Video & Broadcast Unidirectional Condenser Microphone Kit - Walmart.com