Ask HN: Video streaming is expensive yet YouTube "seems" to do it for free. How?

Hacker News Discussion ↗

YouTube’s revenue and unclear profitability

  • Reported $31.5B in ad revenue in 2023; some say this alone likely covers costs, others note revenue ≠ profit and that payout to creators (40–60%) plus infra may leave thin margins.
  • Historical reports suggested YouTube was break-even or loss-making; more recent analyst commentary suggests some parts (e.g., YouTube TV) are reaching profitability.
  • Several commenters think Google may keep YouTube near break-even for tax and strategic reasons; exact P&L is unknown because Alphabet does not break it out.

Cost structure: what’s expensive vs cheap

  • Consensus: bandwidth/egress is the dominant variable cost at scale; encoding and storage are significant but comparatively smaller.
  • Conflicting claims on bandwidth: some say “bandwidth is effectively free” at large scale via peering; others with infra experience say it is still “real money” and a primary cost driver.
  • Storage is cheap per TB but huge volumes (exabyte scale) plus replication and performance make it non-trivial; long-tail, low-view videos complicate tiering and deletions.
  • Encoding is expensive in aggregate but manageable with idle compute and hardware acceleration; quality is tuned down vs “home-rip” quality to save cycles.

Infrastructure, peering, and caching

  • Google owns dark fiber, a global backbone, and has cache nodes/CDN-like infrastructure in IXes and inside/near many ISPs.
  • Popular videos are heavily cached near users; long-tail content may be served from fewer regions or colder storage, sometimes causing slower starts.
  • This global infra is shared with other Google services (search/ads), so video “rides along” on already funded network capacity.

Advertising model and user experience

  • Ads are the main revenue source; many commenters feel ad load and intrusiveness have increased sharply, making non-Premium use “unpleasant.”
  • Some suspect ad-blocking users get worse recommendations; others just see overall recommendation quality decline.
  • YouTube also monetizes via Premium and Music; pricing suggests per-user serving costs are modest but non-zero.

Strategic value beyond direct profit

  • YouTube gives Google massive control over video distribution, user profiling for ads, and a large corpus for AI training.
  • This strategic value may justify low margins or cross-subsidy from search ads.

Why competitors struggle

  • New entrants face:
    • Much higher per-GB bandwidth and CDN costs.
    • No massive ad sales machine or targeting graph.
    • Network effects: creators go where the audience is; audiences go where the content is.
  • Some smaller/niche players (e.g., corporate, live, adult, specialty) survive via narrower focus, own infra, or cheaper hosting/CDN strategies.

Technical tactics and optimizations

  • Heavy use of custom ASICs/FPGAs/GPUs for transcoding; multiple bitrates/resolutions per video.
  • Intelligent caching and storage tiering, possibly re-encoding older/low-traffic videos more aggressively.
  • Some discussion of P2P, Cloudflare R2, and DIY CDNs as ways small players can cut costs, but these add complexity and don’t erase YouTube’s scale advantage.