Before high-speed fiber-optic broadband became globally ubiquitous, downloading digital media was a test of patience. The standard storage format for physical media sharing was the CD-R, which maxed out at 700MB.

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Because blank CD-Rs were incredibly cheap and widely used to play media on standalone home DVD players that supported data discs, release groups optimized their files to fit onto a single 700MB CD. The XviD codec was the absolute king of this era, offering the best balance of visual sharpness and aggressive file compression. The Rise of Adult Parodies