I absolutely hate the gradient on the progress bar. When a video is full screened I'm no longer able to tell at a glance how far along the progress bar is because the gradient and the grey segment for buffering all fades together. This is so simple to not mess up. It worked before. Why did you change it??
/* Remove pink tint from end of progress bar */
.ytp-play-progress.ytp-swatch-background-color,
.style-scope.ytd-thumbnail-overlay-resume-playback-renderer,
.ytp-scrubber-button.ytp-swatch-background-color {
background: var(--yt-spec-static-brand-red) !important;
}
Only does the video progress bar, but I might extend it to the handful of other things that use the gradient.