Fix Youtube horrendous UI

youtube.css

/* https://gist.github.com/nileane/e106311ad1bc8901f019c6eacbfe3ed6 */
#contents > ytd-rich-section-renderer:not(:nth-child(1)),
#sections > ytd-guide-section-renderer:nth-child(3),
#sections > ytd-guide-section-renderer:nth-child(4),
#contents > ytd-item-section-renderer:nth-child(5),
#contents > ytd-reel-shelf-renderer {
    display: none !important;
}

/* https://superuser.com/questions/1859458/is-there-a-way-to-reduce-customize-youtube-user-thumbnail-size-on-the-youtube-h */
#thumbnail, #details, ytd-rich-item-renderer, ytd-rich-item-renderer div {
   max-width: 400px !important;
   max-height: 350px !important;
}