OptionalattributionOptional attribution information about where the video came from.
Optionalcan_Whether this video can be played on a cellular connection.
OptionaldurationThe video duration in milliseconds.
Optionalembed_HTML code that could be used to embed this video into a webpage.
Optionalembed_An IFrame used for constructing video iframes.
Optionalembed_A URL to the embeddable content to use as an iframe.
OptionalmediaOptionalmetadataOptional provider-specific metadata about the video.
OptionalposterAn image media object to use as a "poster" for the video, usually a single frame.
OptionalproviderThe provider of the audio source, whether it's tumblr for native audio or
a trusted third party.
OptionalurlThe URL to use for the video block. Either this, media, or both will always be set.
An NPF video type content block.
See
https://www.tumblr.com/docs/npf#content-block-type-video