Function findNearestThumbnail

findNearestThumbnail(itemType: ItemType, timeCode: TimeCode | TimeCodeInput): string
Find the thumbnail uri in a VidiCore item object that's nearest a timeCode

Remarks
Time code is included in path of VidiCore thumbnail uris

Returns
A URI of a thumbnail, undefined if item has no thumbnails
Parameters
- itemType: ItemType
  
  A VidiCore item object
- timeCode: TimeCode | TimeCodeInput
  
  A timeCode to find nearest thumbnail to
Returns string