Gwilym Sims-Williams.

Writer. Producer. Strategist.

Hey, my name’s Gwilym 👋

I help brands and creators build successful YouTube channels.

As Head of YouTube for Bryan Johnson, I grew the channel from 70K to 2M subscribers, producing 100+ videos.

As Ali Abdaal’s chief writer I scripted 20+ videos, hitting 15M+ views, and wrote 60+ issues of his newsletter.

Other clients include Ramit Sethi, Species AGI, Polaroid Foundation, Oliur/Ultralinx, Matt Gray, Jesse Enkamp, and the University of Cambridge.

I studied English at Cambridge, and graduated top of my year at Edinburgh.

Gwilym’s Newsletter

For tactical YouTube analysis, sign up to my newsletter.

What to expect:

  • ✍️ Advanced scriptwriting tips
  • 🗺️ Strategic analysis of recent videos + trends
  • 👨‍💻Advice on running a world-class YouTube team

Want to work with me?

Here’s how I can help:

🔬 YouTube Consulting - Hire me to consult on your YouTube channel or scripts, either as a one-off or on a recurring basis.

Contact me about your project here, I’ll aim to get back to you within 48 hours.

What people have said:

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“Gwilym is an amazing writer, strategist and all round YouTube pro. Gwilym helped with a range of things from scripts, strategy and my personal newsletter. Couldn't recommend him highly enough!” - Ali Abdaal

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“Gwilym is an excellent scriptwriter. His scripts are well-researched, easy to film, and delivered outstanding results. 100% recommend.“ - Ramit Sethi

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“We had world-class documentary content but needed a strategy to match. Gwilym guided everything from channel setup and launch sequencing to packaging and performance analysis, and the results speak for themselves.” ”Within weeks of launching, our Venice episode was approaching 75,000 views (nearly 15x our projection), we had gained 4,500 subscribers, and 86% of our traffic was generated organically by YouTube's algorithm.” ”We would recommend Gwilym to anyone.” - Alex Marashian, Polaroid Foundation

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