subtitles: The subtitle file contents as a dictionary in the format
{language: subtitles}.
view_count: How many users have watched the video on the platform.
+ like_count: Number of positive ratings of the video
+ dislike_count: Number of negative ratings of the video
+ comment_count: Number of comments on the video
urlhandle: [internal] The urlHandle to be used to download the file,
like returned by urllib.request.urlopen
age_limit: Age restriction for the video, as an integer (years)