1. Which software do you need to download and install?
Kindly note that you will need some extra free software to enable Windows Media Player to play WebM videos. The player lacks the necessary software to split the WebM container format or play audio and video content. Therefore, you will need to download and install some free software to enable you to play WebM files in Windows Media Player. You will need to download and install the WebM/VP8 DirectShow Filters for WebM video playback and Xiph.org OGG Open Codec for WebM audio playback.
In case your system doesn't have Windows Media Player, you will also need to install it in readiness for your operations.
2. Try to play a WebM file in Windows Media Player
If you try playing a WebM file in Windows Media Player, you will most likely see a message box with the information "The selected file has an extension (.WebM) that is not recognized by Windows Media Player, but the player may still be able to play it". Essentially, Windows Media Player is unfamiliar with this kind of extension. It will attempt playing the content anyway. If you have never installed the codec packs previously, the player will most likely fail to identify and play the content. If this happens, you shouldn't panic. Since Windows Media Player is a DirectShow-based player, you can fix the problem by installing DirectShow filters.
3. Install WebM and VP8 DirectShow filters
After you download the WebM/VP8 DirectShow filters to your computer, open the zip file. Locate the "install_webmshow.exe" file and run it. It will launch a step-by-step installer. The download will add DirectShow filters that will enable Windows Media Player to effectively read from WebM multimedia container hence allowing it to play the video. Primarily, the video will not be of great use without the audio element. Since the official WebM/VP8 DirectShow filters lack the software for the OGG Vorbis video, you need to install the OGG codec.
4. Install Xiph.org Open Codec
Once you download the OGG codec from Illiminable Ogg DirectShow Filters for FLAC, Speex, Theora, and Vorbis, you can go ahead and install the Xiph.org codec. Once this is done, Windows Media Player will be able to play the audio element of the WebM file.
If you follow these guidelines to opening and playing WebM files, Windows Media Player should be able to play your WebM files properly. If you encounter strange or jumpy playback, it could be as a result of high resolution often associated with old processors. If it fails to work, you can get either player crashes or an error. In such an instance, you can always visit any of the discussion forums and share your encounter. You will always get some assistance.