Charger Cable 2S 7.4V 1 to 2 USB Charger Replacement for SCX24 RC Car 1A with XH-3P Connector Compatible with Axial SCX10 7.4V 2S Lipo Battery RC Car Truck Drone Boat Quadcopter and Airsoft

so the plug in your video is actually the balance lead. i dont personally recommend charging thru only that. it can cause battery damage overtime. BUT if you want to keep it simple get something like this https://www.amazon.com/URGENEX-Replacement-Connector-Compatible-Quadcopter/dp/B09PBP2HBN/ref=sr_1_5_sspa if you want to do it "properly", let me know and i can explain the "better" setup.