Retrieves scheduling and actual start/end information exposed in a video's `liveStreamingDetails`. The YouTube Data API does not expose a reliable flag that distinguishes premieres from other scheduled broadcasts.
Examples
if (FALSE) { # \dontrun{
timing <- get_video_broadcast_timing("dQw4w9WgXcQ")
timings <- get_video_broadcast_timing(c("video1", "video2", "video3"))
} # }