Q&A for How to Delete Subscribers from YouTube

You won't be able to see those who've made their subscriptions private; they will not appear on your list.

Yes. You can go to options, select Subscribers and choose the specific subscriber you want to block. Then click on the 3-dot structure beside it and select "Remove Subscription from Channel". Take note that this can only be done on a desktop PC. Another way is to simply go to the subscriber's channel and click the flag icon and click from the menu "Block user" no matter if they are subscribed to your channel or not.

You cannot block private subscribers from subscribing from your channel--unless it's just for making them unable to write comments. If you don't want them to write comments, find one of their comments, click their name, go to the "About" section of their channel, click the flag, and hit "Block."

If they look you up they will, the block function will just prevent them from being able to comment.

Currently, you cannot block a subscriber from receiving notifications without deleting them. This feature is not available on the platform.

To remove an entry from search, you click a button text that says "Remove".

No, they cannot. There is no way to disable the ability for others to download your videos. The only thing you can do is to post your videos with the private or unlisted settings, so only people you are okay with can watch them.