Default [Q] Video and typing interruptions

Hi,
I faced a strange and annoying problem on my Galaxy S 4, which is when I play any video clip does not work correctly and appears frequently cutting.
The problem occurs with any video clip either from YouTube or facebook.

Also.. facing same problem while typing message in whats app, Facebook messenger, gmail...
The Device was with me from nearly more than a year and this is the first time I'm having this problem
Is there a solution to it?

Thanks in advance..