If you have younger kids, I bet you are already annoyed by some of the YouTube channels. My 6 year old recently started having an affinity for Minecraft games and for some reason he kind of addicted to game play videos on YouTube channels, and to these channels/people who play the Minecraft and voice over the game action. Some of these adult players use foul language and I don't want to have my kid listens to these crap all day long. I don't mind if he watches cartoons or any other educational videos, but I hate some of these channels like "Annoying Orange", "Stampy", "Stampylonghead" etc.
So, I found a great browser add-on to block these channels. If you are using chrome, you are in a luck. Here's how to block these YouTube channels
Install Video Blocker on Chrome
Follow this link and download the extension for Chrome by clicking on the “Free” button.
When the “Confirm New Extension” box pops up, be sure to click on “Add”. Once it has been installed, you can block channels in one of two ways.
Using Right Click on Video short cut Menu
Find the thumbnail for a video, any video, made by this channel. Right click on it and select “Block Videos From this Channel”. That’s it!
Using Option Menu (You can restore some channels using this method)
Under the Chrome Menu button in the upper right corner of the browser, select Settings. From there, click on Extensions and under “Video Blocker” click on “Options”. If you have a TON of channels you dislike, you can actually load them via a .csv, but If you are really that heated about hundreds of channels I’ll let you go figure out how to do that bit yourself. To do it one at a time, click on the plus button.
Type the channel name into the box provided and click “Add”. One thing to note here, everything you enter is case-sensitive, so videos from a channel named 'VAVO' will not be hidden when you add 'vavo'. The same goes when using the wildcard feature, which blocks multiple channels containing the same text string.
So whether you like it long or short, this is a quick and easy method to remove a channel from your sight forever. (or until YouTube makes a major update and breaks the extension, which happened yet thanks to constant updates from the creator)