Adding channels has been possible since the first version. Taking one back out has not, which made the first screen a one-way door — you added a channel, and if it turned out to be the wrong call you lived with it.

There is now a screen listing the channels you have added, with a button on each to remove it. Removing a channel does not touch your YouTube subscription; it only means RandomYV stops suggesting videos from it.

That distinction is the point of the screen. What you subscribe to on YouTube and what you want a random suggestion from are two different lists, and they drift apart. You subscribe to a channel for one good video and get its next hundred. You keep a subscription out of habit. Meanwhile the channels you would genuinely be happy to see something from are a much smaller set.

Removing a channel here is how you say so without unsubscribing on YouTube and losing track of it entirely.