5% of resources for a single user, but how much for thousands of users at any given moment!! Add to that multiple requests to youtube server gets the server IP blocked. I hope you got the point sir :) You can achieve this from a desktop app but this is a web addon. Also, remember nothing comes free in this world, that free app of yours is most probably monetizing using your personal data and privacy while on your computer. I had received multiple offers to bundle those kinds of apps with my addon but I stayed away for obvious reasons.