Mattiaskrantz

Yes — one of his most ambitious projects involved training an octopus to play piano, a process he documented over six months on his YouTube channel. The video captures the full progression from start to finish and is one of the clearest examples of how far Mattiaskrantz will commit to a single outrageous engineering-meets-music concept.

The gun piano is one of Mattiaskrantz's signature weird-instrument builds — a contraption engineered to generate musical notes from the sounds of people's screams. It sits in the same category as his other custom creations: real working instruments built on a completely absurd premise.

In one of his most-discussed experiments, Mattiaskrantz used magnetic fields to suspend guitar strings mid-air while still producing sound — a result he described as sounding "unreal." The full build video is on his YouTube channel and is a strong example of the engineering-meets-music crossover that defines his style.

His YouTube bio reads "I got my engineering degree from IKEA pls subscribe," a self-deprecating nod to the Swedish flat-pack furniture giant and a wink at his unconventional, self-taught approach to building things. His Instagram bio simply says "I'm an engineer," suggesting there is genuine technical ability underneath the joke.

Mattiaskrantz regularly uses the #rocksmithchallenge hashtag, referencing challenges built around Rocksmith, the guitar-learning game that teaches players through real songs. Guitar skills are a recurring thread in his content alongside the instrument-building and DIY engineering videos he is best known for.

Yes — 3D printing is a core part of his creative process, and it shows up consistently enough that #3dprinting is one of his top hashtags. He has also been connected to Printed Europe events and the Printed World Conference, signalling that he is an active figure in the broader maker and 3D printing community beyond just YouTube.

In one of his most human-focused videos, Mattiaskrantz approached a street musician and handed over a custom-built guitar, capturing the musician's genuine disbelief on camera. It is a format that pairs his engineering builds with real-world reactions, giving his otherwise technical content an emotional hook.

Mattiaskrantz has run sponsored content with Morgan & Morgan, the large US-based personal injury law firm, and BetterHelp, the online therapy platform. Both sponsors align with his predominantly male, 18–34 English-speaking audience, which skews heavily toward the United States.

Mattiaskrantz is Swedish, which feeds directly into his self-deprecating IKEA engineering joke and his involvement in European maker events. Despite being based in Sweden, well over half of his YouTube audience comes from the United States, making him effectively an international English-language creator.

Mattiaskrantz has surpassed 2 million subscribers on YouTube, placing him firmly in the Macro creator tier. His engagement rate runs well above the category average for channels of that size, which is unusual and suggests a highly active core fanbase rather than passive growth.