Music videos without the, um, music

What would your favourite pop videos sound like without the actual music? <br />Not great, probably. But sound designer Mario Wienerroither strips videos of their music tracks and then goes one step further - he adds in funny effects based on the on-screen action. <br />His music-less version of the Britney Spears song 'Oops! ... I Did It Again' has been viewed more than 3m times on YouTube. <br />He gets around copyright laws by saying his videos are parodies - and he says he doesn't make any money from them. BBC Trending had a chat with Wienerroither - and we had a go at making a music-less video of our own.