The Hidden Physical Business Behind the Internet

You buy some servers. You rent space in a building. You sell the bandwidth. That is the plan in your head — and it is the wrong business. The internet is not really a technology business. It is a marine construction, real estate and electricity business that happens to have websites in it. More than 99% of international data traffic moves through submarine fibre-optic cable — somewhere between 500 and 600 active systems, roughly 1.5 to 1.7 million kilometres of glass sitting on the ocean floor. Annual submarine cable investment went from about $0.8 billion in 2015 to about $9.7 billion in 2025. Over the same period, the price of the thing those cables sell collapsed: wholesale transit ran $10 to $14 per megabit in 2008, and about five cents per megabit by mid-2025. So how does an industry whose product lost more than 99% of its unit price attract ten times the capital it did a decade ago? That is what this video is about. A transatlantic system runs around $250 million. Repeaters cost roughly $200,000 each and an ocean crossing needs dozens. Then three to four years of construction, and a chain of consents from every government whose beach you intend to dig up. Then the part nobody budgets correctly. Between 150 and 200 faults happen every year — about three repairs a week, somewhere in the world, forever. Around 70 to 80% are caused by fishing gear and ships' anchors, and only about 2% happen on the high seas. The whole planet is served by a fleet of roughly 60 specialised cable vessels, fewer than 20 of them dedicated purely to repair, average age about 20 years. The average wait from fault notification to a repair ship leaving port was 22.5 days, plus 6.5 days of transit. Rerouting the traffic takes minutes. Repairing the cable takes weeks. That gap is the single most important number in this business. Which is why the ownership changed. Google funded Equiano alone. Data centres used about 415 terawatt-hours of electricity in 2024 and are projected near 950 by 2030. When the electricity bill gets that large, a computing business quietly becomes a power procurement business. The cable stops being a product and becomes a hedge. Chapters 0:00 The Physical Reality of the Internet 1:16 The Undersea Backbone 3:10 The True Cost of Connectivity 6:13 When the Network Breaks 9:36 Why Tech Giants Own the Cables 20:22 The Economics of Maintenance Figures cited are drawn from published industry and agency reporting; where sources use different definitions (vendor-reported fibre kilometres, for example), the video says so rather than stacking the numbers against each other. #internet #infrastructure #submarinecables #datacenters #economics #business