The Embedly extension augments Twitter.com with over 200 embed providers and creates previews for every url.
* Features *
Over 200 Supported Embed Providers:
You can see the full list on http://api.embed.ly, but every big name provider is on there. Watch Videos, listen to audio and view pictures all from inside Twitter's web interface.
Previews for every other url:
If the url is not one of the supported providers we will create a preview with the title, image and excerpt from the page.
Embedly checks every url against malware and phishing lists and warns you if the url exists on one.
How many times do you see posts that just state "Check out this video: bit.ly/linktopost". Embedly examines the page and pulls out the relevant embed from over 70 providers. You can then watch the video directly on Twitter.
HTML5 audio and video tags:
Have you ever wanted to share an mp3 you hosted on DropBox with your Twitter followers? Embedly will use an HTML 5 audio tag to embed the song right in Twitter.