Because news goes stale fast. YouTube often serves commentary that is months old as if it were today's. Here, the newest video is always at the front.

By size: the 40 biggest news channels and the 40 biggest political commentary channels on YouTube. We don't sort them by side or rate them. Each channel shows at most its three newest videos, so the big networks can't crowd out everyone else.

Yes. There are no accounts, no sign-ups and no subscriptions. Every video is free to watch on YouTube.

Politics has no stars; it is sorted by time, newest first. Everywhere else, stars come from public numbers, not reviews, and never from how big a channel is. Each video is scored on three things: how far it reached for the size of its channel, how many viewers liked it, and how many talked about it in the comments. Only videos with two stars or more are listed. The guide 'How the stars work' has the details.