This page has meta tags showcasing the Twitter Player Card with streaming M3U8 content. The streaming video is courtesy of Apple, and you can find more information here: https://developer.apple.com/library/ios/documentation/networkinginternet/conceptual/streamingmediaguide/DeployingHTTPLiveStreaming/DeployingHTTPLiveStreaming.html
When implemented on your own site, please ensure that all links to video are secure (use https).
Lastly, the behavior of streaming video is currently different across mobile platforms. Specifically:
- On iOS, the stream will play inline in the Twitter Card.
- On Android, the stream will open the twitter:player URL in a browser