video lag

[Surcruxum]

Guys can you help me? I downloaded some videos from the Internet and I copied them to my s4. But when I played it with the video app, it's lagging. After few minutes the video and audio didn't match each other. The sound comes out faster and the animations stay behind. Please, any help would be appreciated.

 

[B. Diddy]

Welcome to Android Central! Are you using the stock video player? Try a 3rd party one, like MX Player.