The seconds before kickoff at the world’s biggest soccer games are some of the most challenging seconds in live streaming. Millions of fans press play at once and expect a sharp picture from the first whistle. If the stream stalls, those millions of viewers can churn to a rival broadcaster in a few taps. This summer, System73 helped broadcasters across Latin America stream the FIFA World Cup 2026 under those conditions. We supported more than 20 matches for eight broadcasters at the same time, among them TV Azteca in Mexico, Telefe in Argentina and Unitel in Bolivia, and reached millions of viewers across Mexico, Central America and South America. In Brazil, we delivered the tournament for SBT. The results held up at the busiest moments. Up to 83% of SBT’s peak traffic traveled between viewers instead of through the CDN, giving up to five times the delivery capacity of a CDN-only setup. 

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So what does it take to broadcast live the most important soccer tournament in the world? It takes delivery capacity that grows with the audience, so every fan who presses play makes the network stronger. Here, we explain exactly how that works and what the World Cup showed us.

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The ebbs and flows of a World Cup audience

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A live soccer audience arrives in waves, each one growing within a matter of minutes. Viewers pour in as the first half approaches, drop away at half-time and bounce back for the second half. This is precisely the pattern we observed across every SBT match we delivered during the World Cup, and the final showed it most clearly.  On July 19, the audience for the Argentina vs Spain game on SBT’s platforms grew from around 15,000 to more than 50,000 concurrent viewers in roughly half an hour. Numbers dipped at half-time, then kept climbing throughout the second half to peak in the closing minutes. 

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The Brazil vs Norway game followed a similar path, with the audience more than doubling in about 15 minutes as the first wave arrived. These surges are what make live sport so hard to deliver. Capacity has to be ready at the exact moment the audience arrives, which is also when delivery costs the most. A broadcaster that relies on servers alone has to either over-provision, paying for enough capacity to cover the biggest peak, or risk buffering at the moments that matter most.

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How Edge Intelligence turns every viewer into delivery capacity 

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Every broadcaster we supported during the tournament faced this challenge, often across regions with very different network conditions and infrastructure limitations. SBT’s audience alone reached far beyond Brazil’s major cities, with viewers across the whole country and as far away as Europe and North America.

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An audience that spread out puts heavy pressure on a traditional setup. Every viewer downloads the stream from a CDN’s servers, so each new viewer adds to the load, and viewers far from those servers are often the first to notice problems. Edge Intelligence adds a second, less congested route. Viewers watching the same live stream pass the most recent video segments on to other viewers nearby, while the CDN stays involved and delivers the start of every viewing session. 

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Our servers control every connection, organizing viewers into a broadcast tree where live video passes from one device to the next. The tree is reorganized every 30 seconds to route video around congestion. Only the last 60 seconds of live video is shared, and all transfers are encrypted. Because every viewer who joins can also pass the stream on, the network’s capacity rises with the audience.

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Why a bigger audience makes the network stronger

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With a CDN alone, every extra viewer adds to the load on the servers. With Edge Intelligence, every extra viewer becomes another device that can pass the stream on. The more people watch, the more nearby viewers each device can connect to, and the larger the share of traffic that travels between viewers instead of through the CDN. SBT’s World Cup data shows this clearly. On average, viewers carried around 60% of SBT’s live event traffic, rising to 83% at peak demand. 

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During the Brazil vs Norway game, 71% of traffic traveled between viewers at the moment the audience peaked. Because the CDN only had to carry what was left, the same infrastructure could serve up to five times the audience of a CDN-only setup. Picture quality improved as well. On an average tournament day, more than 82% of SBT viewers watched at optimal resolution, compared with about 75% on days without peer-to-peer delivery. Other broadcasters saw similar results, with more than 90% of viewers receiving the optimal bitrate for their device during the Brazil vs Morocco game.

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Live sport audiences will always arrive in waves. With Edge Intelligence, each wave brings its own delivery capacity, so broadcasters can serve their biggest moments without over-provisioning. 

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To find out how System73 could support your next live event, get in touch with our team.

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