He was inspired to make videos by YourMovieSucksDOTorg, and he finally collaborated with him when they reviewed Black Panther together. In The Gentleman Pirate | Sundance Rejects, Ordinary Things voiced Stede Bonnett and SumitoMedia voiced Ignatius Pell and Mary Bonnet's Face (though her face was portrayed by Twitch streamer selmacashmoney). Jeff The Killer - Creepypasta | Sundance Rejects featured the voices of Fredrick Knudsen, Simian Jimmy, Chills, The Volgun, SkittenSays and Donut Operator. Internet Historian's video Sonic High School | Sundance Rejects featured the voices of Fredrik Knudsen, ChavezzSlovakia, EmpLemon, Cynical Reviews, Thafnine, SsethTzeentach and music by Twomad. This is only for the effects he uses and for people to use.
He has a fifth channel called " Internet Historian: Greenscreens" where he posts many of the effects he uses in his videos for other people to use. He also has a fourth channel called " Storymode," in which he reviews horror video games like Silent Hill. He also has a third channel called " Internet Historian: Live" where he uploads cut down livestreams of games from his Twitch as well as unpublished content. He runs a secondary channel named " Internet Historian: Incognito Mode" (later changed to " Incognito Mode)" where he uploads Q&As on a video he made before, Sundance Rejects, which parodies blockbuster movies and teenager fanfiction, and In the Field (or In the Quarantine), which is a parody talk show hosted by Internet Historian himself and starring his friends including: SumitoMedia, Ordinary Things, Many Kudos, and Pyrocynical, in which usually discusses about a single object, thing, or genre, such as "art," "architecture," "travel," or "ads."
Many claim that his are the best adverts in all of YouTube ascended from being a running gag to a full series of characters with arcs. One of, if not the, most defining aspect of his videos are the advertisements for his sponsors. The "animations" in the videos are png images moving in front of a stock background. His documentaries are laid with various stock photos and videos narrated by his accent, deep baritone voice, text-to-speech, and deadpan snark. Around 2 to 3 weeks, he really gained traction, and he got 100,000 subscribers in about 3 months and then YouTube was a full-time job for him.
He was worried about actual historians saying that he should be more active. He was working on very short videos for various hours and he didn't want to tell anyone about his YouTube channel. On January 9, 2017, he uploaded a documentary about the 4chan event that users raided GameStop to get Battletoads.