ORKVideoInstructionStep Class Reference
ORKVideoInstructionStep object gives the participant video-based instructions for a task.
You can use video instruction steps to present video content during a task.
The URL of the video to play (local or remote)
@property (nonatomic, copy, nullable) NSURL *videoURL
The time (in seconds) at which the thumbnail image is created.
@property (nonatomic) NSUInteger thumbnailTime
When presented, the step view controller will display a preview image of the video to play. This property tells the step view controller at what time of the video this thumbnail image should be created.
Default is 0, negative values will be ignored.