Radio, no sound just buzzing sounds

[Lukaskasc]

Hey everyone, yesterday i went to my garage to check my undercarrage for rust and riffiled some oil, then after turning my ignition on i heard a loud buzzing sound from my drivers speaker, and when you rev the car it goes louder a bit and just pops after a while, after that when you turn on the ignition sometimes the buzzing sound reapears but still no sound, took the aftermarket radio off the wires are all ok doesnt look like anything is disconected, took off drivers door cover the wires look fine, check the fuses witch are all good too, do you have any idea what it could be? I think its shorting somewhere but didint find anything. Later i will upload a video and post a link to see what im talking about

 

video for my probelm: