Samples

{
	"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
	"type": "AdaptiveCard",
	"version": "1.1",
	"fallbackText": "This card requires Media to be viewed. Ask your platform to update to Adaptive Cards v1.1 for this an more!",
    "body": [
        {
            "type": "Media",
            "poster": "https://docs.microsoft.com/en-us/adaptive-cards/content/videoposter.png",
            "sources": [
                {
                    "mimeType": "video/mp4",
                    "url": "https://adaptivecardsblob.blob.core.windows.net/assets/AdaptiveCardsOverviewVideo.mp4"
                }
            ]
        }
    ],
    "actions": [
        {
            "type": "Action.OpenUrl",
            "title": "Learn more",
            "url": "https://adaptivecards.io"
        }
    ]
}