What is FLV (Flash Video)? Complete Guide to FLV Files

Year2003

TypeVideo

UsageLegacy web video

What is it?

FLV (Flash Video) is a legacy video format that was used to deliver video on the web through Adobe Flash Player. It was the dominant web video format from 2003 until Flash Player was discontinued in 2020.

FLV files were used by YouTube, Hulu, and virtually every major video platform before HTML5 video replaced Flash. FLV is now essentially obsolete but many legacy video files still exist in this format.

Technical Specifications

Created ByAdobe / Macromedia

ContainerFLV

CodecsH.263 video, Sorenson Spark, VP6

StatusObsolete (Flash discontinued 2020)

Browser SupportNone (Flash required, now removed)

Max ResolutionVariable (HD possible)

Pros & Cons

Advantages

Legacy Compatibility

Some older media players and systems can still play FLV files.

Historical Use

FLV was the universal web video standard for over a decade.

Compact Size

FLV files were optimized for web streaming with reasonable file sizes.

Wide Archives

Many archived web videos from 2003-2015 exist in FLV format.

Disadvantages

Obsolete Format

Flash Player was discontinued in December 2020 - FLV is no longer supported by browsers.

No Native Support

No modern browser, phone, or tablet can play FLV without conversion.

Security Risks

Flash Player had numerous security vulnerabilities leading to its discontinuation.

Poor Quality

FLV codecs (H.263, VP6) are significantly inferior to modern H.264 and H.265.

When to Use It

Here are the most common situations where FLV (Flash Video) is the right choice:

Legacy Content Archival

FLV is used when accessing archived web content from the Flash era.

Video Conversion Source

FLV files are common source files for converting to modern formats like MP4.

Digital Preservation

Archivists work with FLV when preserving historical web video content.

Nothing Modern

FLV should not be used for any new video content - use MP4 or WebM instead.

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Frequently Asked Questions

How do I play FLV files?

VLC media player can play FLV files. No web browser can play FLV since Flash was discontinued.

How do I convert FLV to MP4?

Use our free online converter or VLC media player to convert FLV to MP4 for modern compatibility.

Is FLV still used?

No, FLV is obsolete. Flash Player was officially discontinued in December 2020.

Can I play FLV on my phone?

Most phones cannot play FLV natively. Install VLC for mobile to play FLV files.

Why was Flash/FLV discontinued?

Adobe Flash had persistent security vulnerabilities and was incompatible with mobile devices, leading to HTML5 video replacing it.