YouTube creatorZach Star’s videos introduce mathematical and scientific ideas through examples, then Brilliant is presented as a way to continue learning through interactive exercises. The sponsor reads appear in two settings: a video about methods for counting, and a response to flat-earth comments. In both, the host connects the platform to hands-on problem-solving rather than passive lectures. That educational fit aligns with the channel’s explanatory style and gives a clear way to transition from watching to trying an idea.
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Zach Star × Brilliant
How do we know...(these random things)?
BRANDS IN THE VIDEOS
Brilliant leads the sponsor relationships shown here, with 62 sponsored videos. CuriosityStream follows with 8.
4 of 9 brands (44%) appear in more than one sponsored video in Sponsorbook’s history of Zach Star.
The brands, creative choices and product connections worth paying attention to.
At the end of “How do we know...(these random things)?,” the creator points viewers toward Brilliant after discussing unusual counting methods. He describes visual lessons across math, science, programming, data analysis and AI, then emphasizes real-world applications and solving problems interactively. The placement follows directly from the video’s focus on how mathematical ideas help explain things in the world.
This makes a compact learning invitation: viewers who liked the explanation can try working through related concepts themselves. A strong brief can connect one specific idea from an episode to a lesson or exercise the creator can demonstrate, then explain how interactive practice differs from simply watching another video.
In the flat-earth comments video, Zach Star responds to claims that unfamiliar scientific ideas must be fake. The Brilliant read uses the channel’s “don’t be dumb, be brilliant” wordplay and describes lessons as hands-on problems with practice and daily encouragement. The spot positions learning as building understanding through practice, then closes with an offer before the creator returns to comments.
The community-facing setup gives the ad a different tone from the math-video close. It speaks to viewers who want to work through a concept rather than stop at a disagreement. The sponsor remains a learning tool, while the creator’s scientific argument remains in the video itself.
Brilliant fits Zach Star when the pitch identifies what a learner can explore next. Naming a lesson category or demonstrating an exercise gives the viewer a more concrete invitation than simply calling the app educational. The channel’s examples are short, direct and return quickly to the original topic.
Watch how the product becomes part of the video.
Sponsor at 10:00Brilliant25 Sep 2025After discussing unusual counting methods, Zach Star introduces Brilliant’s interactive lessons across technical subjects and emphasizes real-world applications and problem-solving. The ad extends the video’s math topic into an invitation to practice. The creator then closes the episode.
Sponsor at 12:03Brilliant28 Mar 2025In a response to flat-earth comments, Zach Star uses channel wordplay to introduce Brilliant and describe hands-on exercises and practice. The sponsor read appears between the creator’s replies to viewers. The comment responses continue after the sponsor message.
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