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Revolution OS is a feature-length documentary on the history of free software and Linux. It covers Stallman and the GNU project, Torvalds and the kernel, and Raymond and Perens on open source, starting from the era of freely shared hobbyist code.

Tantacrul walks through how the MuseScore 4 team was built and how design decisions were made for the overhaul of a huge legacy notation app. It covers playback and engraving quality improvements.

Veritasium tells the story of the XZ backdoor, how a patient attacker became maintainer and nearly compromised SSH on Linux systems. It also covers free software history and how encryption in SSH works.

Tantacrul's 76-minute deep dive into the history of western music notation and the many proposed replacements, such as piano rolls, colored notes and the jubilate. He explains why none have displaced the current system.