HyperTube от tango54321

HyperTube lets you whitelist one YouTube channel handle and strips everything else out of your feed. When active, it hides sponsored content, the Shorts shelf, ads, and videos from any channel not on your list — on the YouTube home page as well as on channel pages.
Click the extension icon to open the filter popup, enter the channel handle you want to allow, and browse YouTube without the algorithmic noise.
Note: this is a personal-use content filter that works by modifying the page's DOM; it does not collect or transmit any user data.