VideoBinary

`video/x-flv`

Flash Video

Reference for video/x-flv, Adobe's Flash Video format that was once dominant for web video before HTML5.

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Expected extensions: .flv

HTTP Content-Type Header

HTTP Header

Content-Type: video/x-flv

Associated File Extensions

.flv

Quick Facts

MIME Type	video/x-flv
Category	Video
Type	Binary
Extensions	.flv

Common Usage

FLV was the dominant web video format during the Flash era, powering YouTube, Hulu, and most streaming sites before 2015. Flash Player's deprecation ended FLV's relevance, but legacy FLV files still exist in older video archives and may need conversion to MP4.

Code Examples

HTML

<!-- Link or embed with explicit type -->
<link rel="stylesheet" href="file.flv" type="video/x-flv">

<!-- Or for script/media elements -->
<script type="video/x-flv" src="file.flv"></script>

Node.js

// Express.js
app.get('/file', (req, res) => {
  res.type('video/x-flv');
  res.send(data);
});

// Node.js http
res.writeHead(200, { 'Content-Type': 'video/x-flv' });

nginx

# nginx.conf — add to types block or use default
types {
    video/x-flv  flv;
}

# Or set for a specific location
location /api/ {
    default_type video/x-flv;
}