Files with the H263 extension are video files. The H.263 standard was created in 1996 for video conferencing applications. H263 files are rare, so most media players cannot open them.
If you have an...
Files with the H263 extension are video files. The H.263 standard was created in 1996 for video conferencing applications. H263 files are rare, so most media players cannot open them.
If you have an H263 file, it was likely recorded using a 1990s video conferencing program. To open an H263 file, install software that supports the format, like MediaCoder. If you already have a compatible program but it is not set as the default, right click the file, choose “Open with,” and select the program.
Possible reasons an H263 file will not open: the file is corrupt, required software is not fully installed, your computer lacks the hardware resources, or the drivers are outdated. Check the file extension as well – it may be typed incorrectly. Similar extensions include 263.
To view the file, install software that recognizes H263. Even after installing the software, your operating system may not automatically associate the H263 extension. If not, manually select the program you want it to use by default when opening these files.
Be careful when opening H263 files from unknown sources, as the extension can be used by harmful malware. Do not open suspicious files. When double clicking to open a file, Windows checks the extension then launches the associated program. If it does not recognize the extension, the file will not open.
VLC Media Player
FFmpeg
Media Player Classic