Format Guides
Video Formats Guide: MP4, MOV, AVI, WebM and More
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Apps66 Team
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Video formats can be confusing with terms like containers, codecs, and bitrates. This guide breaks down what you need to know to choose the right format for recording, editing, sharing, and streaming.
Containers vs Codecs
Container (Wrapper)
The file format that holds video, audio, and metadata together. Examples: MP4, MKV, AVI, MOV.
Codec (Compressor)
The algorithm that compresses/decompresses video data. Examples: H.264, H.265 (HEVC), VP9, AV1.
Think of it like this: the container is the box, the codec determines how the contents are packed inside.
Common Video Containers
MP4 (.mp4)
- Compatibility: Universal
- Codecs: H.264, H.265, AAC audio
- Best for: Web, streaming, general sharing
MKV (.mkv)
- Compatibility: Good (most players)
- Codecs: Any (very flexible)
- Best for: High-quality storage, multiple audio tracks
MOV (.mov)
- Compatibility: Good (especially Apple)
- Codecs: ProRes, H.264, HEVC
- Best for: Professional editing, Apple workflow
AVI (.avi)
- Compatibility: Universal (but dated)
- Codecs: Various (often DivX/Xvid)
- Best for: Legacy compatibility
WebM (.webm)
- Compatibility: Good (web browsers)
- Codecs: VP8, VP9, AV1
- Best for: Web video, open source projects
Video Codecs
H.264 (AVC)
- Industry standard for 10+ years
- Universal hardware/software support
- Good quality-to-size ratio
H.265 (HEVC)
- 50% better compression than H.264
- Excellent for 4K content
- Growing but not universal support
VP9
- Google's open alternative to HEVC
- Used by YouTube
- Good browser support
AV1
- Newest, most efficient codec
- 30% better than HEVC
- Royalty-free, growing support
Format Selection Guide
- Sharing online → MP4 (H.264)
- YouTube upload → MP4 or MOV (H.264)
- Archive quality → MKV (H.265) or MOV (ProRes)
- Editing source → MOV (ProRes) or original camera format
- Web video embed → MP4 (H.264) with WebM fallback
- 4K storage → MKV (H.265 or AV1)
Resolution and Quality
- 480p (SD): 854×480 - older standard, small files
- 720p (HD): 1280×720 - good for web
- 1080p (Full HD): 1920×1080 - current standard
- 4K (UHD): 3840×2160 - high-end content
- 8K: 7680×4320 - future-proofing
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Frequently Asked Questions
MP4 with H.264 video codec and AAC audio. YouTube recommends 1080p or higher at 8+ Mbps bitrate.
Video file size depends on resolution, length, bitrate, and codec. Use H.265 instead of H.264, or reduce resolution/bitrate.
If both use compatible codecs (like H.264), you can "remux" - essentially copy streams to new container with no quality loss.
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Written by Apps66 Team
The Apps66 team creates helpful tutorials and guides to help you get the most out of file conversion and online tools.
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