We just fixed an issue with the YouTube homepage not loading correctly – if you were seeing an empty/blank homepage or only a few videos showing up there, please refresh your browser or app and it should be working now. Thanks for all of your reports and your patience!
That's odd. If you are using a browser, try clearing cache and cookies. Here's how: https://goo.gl/dwzcyo . If you are using the app, try deleting the app, restarting the device and reinstalling the app. Keep us posted!