Cards with Video

<TimelineMessage>
    <Card videoUrl="https://youtu.be/TiYIR5eROOU" title="Check this out" />
</TimelineMessage>

Card with video and custom thumbnail

<TimelineMessage>
    <Card videoUrl="https://vimeo.com/326450452" imgUrl="https://bit.ly/2U1c08j" />
</TimelineMessage>