Metadata in video: what MP4 and MOV store

Updated: September 4, 2026

Photos get the attention: plenty of people have heard of EXIF and location tags. Video is quieter, even though roughly the same things are recorded — and sometimes more. It is simply harder to look inside a clip than inside a still.

A video file is a container. Along with the picture and sound tracks it holds a service section, where the camera, the phone and the editing software each write down a note about themselves. Below: what ends up there and how to clear it without touching the image.

What your phone records while filming

The exact set depends on the device and its settings, but this is the usual line-up:

• creation_time — the date and time recording started, with a time zone;
• the coordinates of the shot — on iPhone files this is com.apple.quicktime.location.ISO6709, holding a string like +55.7558+037.6173/, latitude and longitude in plain text;
• device maker and model — com.apple.quicktime.make and com.apple.quicktime.model;
• the firmware or application version the clip passed through;
• the name of the editing software, if the video was rebuilt;
• chapter markers and internal track names that editors add automatically.

One subtlety: even if you filmed with location off, a tag can appear later. Many editors carry service fields over from the source into the result, and some add a signature of their own — enough to tell which software did the edit.

Where this surfaces

An apartment walkthrough sent to a prospective tenant. A product clip filmed at home and posted to a classifieds board. A video CV. Footage from a company event handed to a contractor. In all of these the file usually travels as-is — by email, by link, or through a messenger set to send as a file — and the service section rides along.

For video this stings more than for photos: people film where they live and work, and a long clip is harder to simply reshoot once you discover it carried more than you meant.

How to clean a video, step by step

1. Open the Remove metadata tool — no account needed.
2. Drag an MP4 or MOV file into the upload area. The free plan allows 3 videos a day at up to 50 MB each; Premium raises both.
3. Wait for the Download link. Processing takes seconds even for a large file.
4. Download the result — the clip comes back with a clean- prefix and the same extension.
5. Publish or send the cleaned copy; your original stays with you.

Along with the service fields we drop the chapter markers and the packaging software signature — a cleaned file gives no clue about what processed it.

Why quality does not suffer

There are two ways to process video. The first is to decode the picture and build it again; that is what editors do, and it always costs quality. The second is to move the finished tracks into a new container without touching the compressed data. We take the second route: the tracks are copied byte for byte and the service section is simply not carried over.

The upside follows: resolution, bitrate, frame rate, codec and audio stay exactly as they were, and processing is quick — the work is on the shell of the file, not on every frame.

How this differs from uniquifying

These two jobs get confused often. Removing metadata does not change the image: the frames stay identical to the source. To a platform that compares the content rather than the service fields, the clip is still the same recording.

If what you need is a different picture, that is another tool — Video uniquifier. It shifts and crops the frame, changes the speed and the colour, which means it necessarily rebuilds the video. The choice is simple: privacy means stripping metadata, different copies mean uniquifying.

Frequently asked questions

• Will the video still play everywhere? Yes. The container and codecs are untouched; only the service section changes.
• The social network re-encodes my clip anyway, so why clean it? You do not control that re-encode, and the platform receives your full original regardless. Besides, in plenty of channels — email, file hosting, sending as a file — the clip travels unchanged.
• What about long clips? The limit is on file size, not duration: up to 50 MB on the free plan, 100 MB on Premium.
• Are formats other than MP4 and MOV supported? For video those are the two. The type is detected from the content, so a renamed file is still recognised.
• How do I check the result? Your system file properties will show the date and, if present, device information. On a cleaned clip only the technical characteristics of the recording remain — duration, resolution, codec.