From Physiotherapy Clinic to $1M Online Membership: How Will Harlow Built an Audience Before He Had a Product
.png)
Learning how to build an audience before launching an online course is advice most creators hear and ignore. Will Harlow didn't ignore it. For two years, he made videos almost nobody watched.
He was a physiotherapist running a small clinic in Hampshire, England. The YouTube channel was a side project, a way to give his patients something to take home. Two years of consistent work. Two years of showing up. At the end of it, he had 1,000 subscribers.
Then one video changed everything.
"It was, like, a two-week period where 1,000 subscribers became 10,000, and then another two-week period when 10,000 became 100,000, so it just, like, took off like a rocket."
The phone didn't stop ringing. People were calling from across the UK, then from across the world. It was just Will, his wife on the front desk, and a clinic that had no idea what had just hit it. They closed the doors for a weekend just to keep the whole thing from imploding.
That chaotic weekend was the beginning of a business that would go on to generate over $1 million in revenue, serving active adults in their 50s, 60s, and beyond, in their living rooms, on their own schedule, from a single Kajabi membership.
The Origin
Will didn't set out to build an online business. He set out to be a good physiotherapist.
He ran a brick-and-mortar practice in Hampshire, treating patients in person the way physiotherapists do. When he started making YouTube videos, they weren't a business strategy. They were patient resources, something people could take home and use between appointments. Helpful, practical, and watched by almost no one outside his existing patients.
For two years, that was fine. The clinic paid the bills. There was no pressure to monetize the channel, no urgency to rush a product to market. Will had something most online creators don't have at the start: the financial stability to be patient.
"I was doing pretty much thankless videos for the first, like, 2 years. I think we got 1,000 subscribers in 2 years, so literally it was the tiniest channel."
That patience would turn out to be the most important decision he made. Not because the slow build was a strategy, but because it gave him the time to understand exactly what his audience needed before he tried to sell them anything.
He just didn't know yet how fast everything was about to change.
The Decision
When the viral explosion hit, Will needed to move fast. He already had a CRM for the clinic, but its membership functionality wasn't built for what he wanted to create. He needed something purpose-built for hosting content, taking payments, and running a structured membership at scale.
He'd heard about Kajabi on a marketing podcast and the name had stuck. When the moment came to find a platform, he knew where to start looking.
He tried it and his thinking was straightforward: one platform that handled everything. Hosting, payments, membership management, all in one place. He didn't want to bolt together multiple tools or find himself migrating to something bigger later. In his own words, Kajabi "just stood out as the obvious choice, because it's such an all-in-one solution."
That was enough. He signed up and got to work.
How to build an audience before you have a product... The method Will used.
Here's the part of Will's story that most creators get wrong.
When the channel exploded, the instinct would have been to launch something immediately. The audience was there. The demand was real. The phone was ringing off the hook with people asking for help.
Will waited anyway.
"I probably had a big audience for, like, 2 years before I even had a product. And that really helped me develop a lot of trust with the audience first, while I figured out what they needed, rather than just jumping at the chance to sell them the first thing I could think of."
That patience had a cost. He left money on the table while he watched, listened, and learned. But it also meant that when he did launch, he understood his audience in a way most creators never do.
The first version of the product taught him something he didn't expect. He priced it too low. And the structure wasn't right. He'd built a library of videos with loose guidelines on how to use them, and handed it to members with a rough map and a good luck.
It didn't land the way he hoped.
"One of the biggest lessons I think I've learned is how people really like structure, and they like to be told exactly what to do — day one do this, day two do that, day three do the other."
He rebuilt the product around that insight. The result is a structured 12-week membership program. Step by step, session by session, each one building on the last. No guesswork for the member. No wondering what to do next. Just show up, follow the program, and move.
The audience he'd spent two years building trusted him enough to follow. The product he'd spent two years learning how to build was finally good enough to deliver on that trust.
"One of the biggest lessons I think I've learned is how people really like structure, and they like to be told exactly what to do."
The Result
Lifelong Mobility now generates over $1.2 million in revenue, built around a structured 12-week membership program for active adults in their 50s, 60s, and beyond, teaching mobility and strength routines they can follow at home. The membership reaches people across the globe, the same people who were calling from every corner of the world the weekend the clinic temporarily closed its doors.
Will still runs the brick-and-mortar practice in Hampshire. The in-person clinic that gave him the stability to build without pressure is still there. But the online business has grown far beyond it. Two businesses from one origin, one physiotherapist, one YouTube channel that almost nobody watched for two years.
The members who found him through those videos, the ones who watched the back catalogue light up overnight, now follow a program built specifically around what they told him they needed. Not a library of content to navigate alone. A guided path, session by session, week by week.
"I probably had a big audience for, like, 2 years before I even had a product. And that really helped me develop a lot of trust with the audience first, while I figured out what they needed, rather than just jumping at the chance to sell them the first thing I could think of."
That trust is what the business is built on. The revenue is the proof it worked.
Their Advice
"Spend a long time building an audience and developing trust before launching a product. Figure out what people actually need rather than jumping at the chance to sell them the first thing you can think of."
— Will Harlow, physiotherapist and founder of Lifelong Mobility
Will spent two years making videos before he had anything to sell. That patience, backed by a platform built to handle everything when the moment came, turned a YouTube channel into a million-dollar membership business.
If you're ready to build yours, see what Kajabi can do for your business.