to unsubscribe from a YouTube channel on a computer:

If you’re at your computer instead of on your phone, you can also unsubscribe from YouTube videos with relative ease.

1. Head to YouTube in your browser.
2. Click the search bar at the top of the page and enter the name of the channel you want to find.
3. Click on the grey button labeled “Subscribed” on the right-hand side of the channel home page.
4. Answer the YouTube prompt confirming you want to unsubscribe from this channel

to unsubscribe from a YouTube channel on a Mobile:

If you’re on the YouTube app on your phone and want to unsubscribe from a channel, all you need to do is find the home page of that channel in the app an tap the same button you tap to subscribe. The easiest way to get there is:

1. Open the YouTube app.
2. Tap the Search icon in the top right and type in the name of the channel or personality.
3. Tap the grey button labeled “Subscribed” on the channel home page.
4. Answer the YouTube prompt confirming you want to unsubscribe from this channel.