Boos are ghost-like creatures that appear in the Mario franchise. They are typically found in dark areas, such as haunted houses and castles. A fanart Super Mario progress bar for YouTube with Mario Boo.
Personalize your YouTube player with stylish progress bars. Pick from curated collections, change colors, and enable animations.
Experience a fresh perspective on your favorite videos with Boo! Boo introduces an array of customized progress bar designs for YouTube™ that add a splash of originality to every watch session. Each style incorporates a unique blend of hues, patterns and transitions, featuring the versatility of custom color options, all powered by our seamless browser extension - Custom Progress Bar for YouTube™. Unleash your creativity and give your viewing experience an extraordinary makeover with Boo!
