The web player will play certain videos uploaded to the website. If you want your video to play online, it must meet certain criteria.
The recommended video and audio codecs are h264 and aac respectively, in a mp4 container. These videos will play in the web player on all HTML5 compliant browsers.
If your video is flash video / audio, it will play in the web player in browsers that support Flash. This support is being depreciated from most browsers, so we advice against providing Flash videos.