The deputy leader of the Labour Party Tom Watson, and Singer-Songwriter, Newton Faulkner were among those at a protest outside Google's headquaters in Kings Cross.
The demo aimed to raise awareness of issues around royalties, amid claims tech giants are failing to pay songwriters fairly, and are attempting to block EU plans to improve copyright laws.
In response, YouTube said:
We have music licensing agreements all over the world, including in the UK and Europe.
Through these agreements, we pay the majority of our revenue to partners, amounting to over a billion dollars for the music industry in the last 12 months.