Sample MP4 Videos
H.264 test videos with an on-screen timecode and frame counter, so you can verify playback, seeking and sync at a glance. From tiny 1 MB clips to 4K.
Need a MP4 of a different size?
Create a valid MP4 file of any exact size, byte for byte, right in your browser. Nothing is uploaded, and you can generate as many as you like.
- Perfect for upload limits: 9.99 MB, 10 MB and 10.01 MB in seconds.
- Up to 20 copies at once, bundled in one ZIP.
- Unique copies get different checksums, for duplicate-detection tests.
What you can test
- Player playback, seeking and buffering.
- Upload limits with the 1 MB, 5 MB, 10 MB and 20 MB files.
- Transcoding and thumbnail extraction pipelines.
- Audio and video sync with the beep-and-flash clip.
- Vertical 9:16 layouts for stories, shorts and reels.
- Muted autoplay, and players that expect an audio track.
- Responsive layouts from 480p up to 4K.
MP4 format facts
| Extension | .mp4 |
|---|---|
| MIME type | video/mp4 |
| File signature | Bytes 4–7: 66 74 79 70 (ftyp) |
| Origin | MPEG, 2001 · ISO/IEC 14496-14 |
| Files here | 0 · 0 B in total |
| License | Free for any use, no attribution |
What is a MP4 file?
MP4 (MPEG-4 Part 14) is a container format standardized in 2001. It usually holds H.264 or H.265 video with AAC audio, and it plays on almost every browser, phone and TV.
Every video here uses H.264 and AAC for the widest compatibility. Each frame shows its resolution, timecode and frame number, which makes dropped frames and seek errors easy to see.
Embed in HTML
<video controls playsinline width="1280">
<source src="files/mp4/sample-1080p.mp4" type="video/mp4">
</video>MP4 files: common questions
Which codecs do the videos use?
H.264 (AVC) video and AAC audio in an MP4 container. This combination plays in every modern browser and on almost every device.
How do I test audio and video sync?
Use the A/V sync clip. A tone beeps once a second at the exact moment a white marker flashes. If you hear the beep before or after the flash, sync is off.
Can I use these videos in commercial projects?
Yes. Every video here is free for any use, including commercial testing, demos and tutorials. No attribution is required.
Can I download the same video more than once?
Yes, as many times as you like. There is no sign-up, no daily limit and no waiting timer. Direct links also work in scripts, CI jobs and automated tests.
Can I get an MP4 of an exact size?
Yes. The file generator pads a valid MP4 to any exact size in your browser, which is ideal for testing upload limits such as 25 MB or 100 MB.