Zencoder
Zencoder is the creator of an open-source HTML5 video player, Video.js, built with Javascript, HTML, and CSS. Video.js plays video via native playback in all HTML5 browsers and devices, or through Adobe Flash when HTML5 playback is not available.
Bitmovin
The HTML5 and Flash-based Web player bitdash can be used in Web Browsers on desktop computers and smartphones. This player enables the streaming and playback of MPEG-DASH or Apple's HTTP Live Streaming, using either the HTML5 Media Source Extensions or Flash, depending on the platform. DRM is enabled through the usage of the HTML5 Encrypted Media Extensions as well as Flash. It is compatible to popular tools such as x264 or MP4Box.