Browse all MIME types

video/x-flv

FLV survives in older media archives and migration projects even though it is no longer a preferred delivery format.

video
Usually already encoded

Content-Type header

Content-Type: video/x-flv
Common extensions
.flv

How teams usually encounter it

This page maps the media type to the file extensions and delivery behaviors developers usually care about: browser parsing, upload validation, cache correctness, and asset handling.

Compression signal

video/x-flv is usually already compressed or stored in a binary-heavy format, so extra transfer compression tends to help less.

Server config snippets

Use these when a server is missing the right extension-to-MIME mapping or you want the expected header to survive a proxy, CDN, or custom asset bucket setup.

Nginx
types {
  video/x-flv flv;
}
Apache
AddType video/x-flv .flv

Signature note

This MIME type does not include a magic-byte sample here because the signature is either format-dependent or not reliable enough to present as a debugging shortcut.

Operational shortcut

If a browser downloads this asset instead of rendering it correctly, check the response header first, then verify the extension mapping on your origin and edge cache. .flv is the fastest sanity check for teammates reviewing the file outside the app.

Related video types