The holidays may be a popular time for pie, but every day could use a little pi (the mathematical constant, of course). Mathologer, a YouTube channel operated by Monash University (Melbourne, Australia) math professor Burkard Polster, brings viewers all that and more. Polster's friend and fellow math professor Marty Ross collaborates on videos behind the scenes. Together, the duo created an informative and well-received platform that has garnered a significant following since launching in 2015. Most videos have more than 100,000 views, and some have more than one million. These videos tackle fascinating formulas and theorems and walk users through examples to test knowledge along the way. Though the content is often complex, plenty of humor is mixed in to keep viewers engaged. Plus, videos range in length, and some of the shorter snippets may be a welcomed tool for math educators. Readers in the holiday spirit may enjoy the December 24, 2019 video on "Fermat's Christmas theorem." New videos are released semi-regularly, so check back often for additional content.