Limelight
What Is MP4 Format?
MP4 (MPEG-4 Part 14) is the most widely supported video container format, combining compressed video and audio streams in a single file — the universal export standard for screen recordings.
MP4 is a container format, meaning it is a wrapper that holds encoded video streams, audio streams, subtitles, and metadata together in one file. The file extension is .mp4. Inside the container, video is most commonly encoded with H.264 (AVC) or H.265 (HEVC), both of which offer excellent quality at manageable file sizes. MP4 grew from the MPEG-4 standard developed in 1998 and has become the dominant video format on the web, on mobile devices, in email attachments, and in cloud storage — essentially everywhere video is played or shared. Safari, Chrome, Firefox, iOS, Android, Windows, macOS, and virtually every video player support it natively.
For screen recordings, MP4 is the right default export choice because of this universal compatibility. A .mp4 file can be attached to a Slack message, embedded in a Notion page, uploaded to YouTube, dropped into a website, or played on any device without the recipient needing to install codecs or converters. The alternative most common on macOS is MOV (QuickTime Movie), which is Apple's native container. MOV is excellent on Apple devices but less universally supported outside the Apple ecosystem. MOV and MP4 often use the same underlying H.264 video codec — the difference is primarily the container wrapper, not the video quality.
Limelight exports to MP4 directly from its built-in editor, using encoding settings tuned for screen content — high enough bitrate to keep text sharp and UI edges clean, small enough for easy sharing. For vertical social content, Limelight also exports 9:16 MP4 files suitable for direct upload to Instagram Reels, TikTok, or YouTube Shorts without any format conversion. The combination of MP4 output and 9:16 export means recordings produced in Limelight are ready to share in any context.
Why Limelight
- ▸MP4 is a container format — it wraps H.264 or H.265 video (and optionally audio) in one universally playable file.
- ▸Supported natively by every major browser, OS, phone, and video platform — the safe default for sharing.
- ▸MOV is Apple's native container and similar in quality to MP4, but less compatible outside Apple devices.
- ▸Limelight exports to MP4 directly, with encoding tuned for screen content sharpness and manageable file size.
Cursor spotlight free · from $2.99/mo or $34 lifetime · macOS 14+
Or get Pro — from $2.99/mo · See how it works →
free to start, then go Pro from $2.99/mo or a $34 one-time lifetime license. macOS 14+, notarized by Apple.
FAQ
- What is the difference between MP4 and MOV?
- Both are container formats that can hold H.264 video. MOV is Apple's native container — great on Mac and iOS but less compatible elsewhere. MP4 is the universal standard supported by all platforms. For sharing screen recordings beyond the Apple ecosystem, MP4 is the better choice.
- What codec is used inside an MP4 screen recording?
- Most screen recording apps encode with H.264 (AVC) or H.265 (HEVC). H.264 offers the broadest compatibility. H.265 achieves smaller file sizes at equivalent quality but requires a compatible decoder. Limelight uses settings optimized for screen content clarity.
- Can I upload an MP4 screen recording directly to YouTube or social media?
- Yes. MP4 is the accepted upload format for YouTube, Twitter/X, LinkedIn, Instagram, and TikTok. Limelight exports to MP4 and to 9:16 vertical MP4, so recordings can be uploaded to social platforms without any additional conversion.