Marques joined YouTube on March 21, 2008.[10] He first started uploading technology videos in January 2009, while still in high school, about new products or reviews of products he already owned.[11][12] He produced his first videos through screencasting.[12][13] His first several hundred videos were primarily hardware tutorials and freeware.[5] As of December 2019, his channel has gained over 10 million subscribers,[10] making MKBHD one of the most subscribed-to technology-focused YouTube channels, according to Social Blade.[14][15] Marques uploaded his 1000th video on March 29, 2018.[16]