Simplistic Minimalistic YouTube
This simple extension encourages you to only use the YouTube website for watching videos from those who you subscribe to.
On the homepage of YouTube, it removes the entire video browsing section.
In the sidebar drawer, it removes the "Explore" and "More from YouTube" sections.
On video pages, it removes the right side column section for browsing suggested videos, and it removes the comments section.
For ads, it will black out the ad, mute the ad, and let you take a moment to breathe until the ad is over. Once the ad is finished (or you skip the ad), your video will unmute and play.