| File Format | Era | Key Characteristics | Typical Resolution | | :--- | :--- | :--- | :--- | | | Feature Phone (2000s) | High compression; designed for 3G networks and limited storage. | 144p to 240p | | MP4 (H.264) | Early Smartphone (2010s) | Better balance of quality and file size; industry standard. | 480p to 1080p | | WEBM (VP9) | Modern Smartphone (2010s-Now) | Royalty-free, open format; optimized for streaming, especially on YouTube. | 720p to 4K+ | | HEVC (H.265) | Modern & Future | High-Efficiency Video Coding; compresses 4K/8K video far more effectively than H.264. | 4K & 8K |
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