Passed to RichContentCard by DumpCard (compact), Dump,
DumpEdit and DumpCreateModal, the last two without a dump to play from.
optional
compact: boolean
Shows a card's thumbnail alone, as a play button or a link out.
optional
thumbnailOverrideUrl: string
The dump's uploaded thumbnail, shown instead of the provider's and used as the player's artwork.
optional
dumpHref: string
The dump's page, which the global player's title links to.