There used to be, actually. YouTube got rid of it about a year or 2 ago, though. I never understood why, but I do remember I could go through all my subscriptions to pick a channel and it would end up in the special subscription box I made. It was so useful, never understood why YouTube would delete such a great feature like that. I wish I had some sort of proof to back it up but it was on my old deleted YT account. It was essentially a special subscription box that fitted just under "subscriptions". It allowed you to name it and add/remove channels. I wish they added it back in, it was very useful.I wish there was a way to filter out subscriptions so that I could put them in groups