every youtube video's script begins with this exact series of words:

"hey guys welcome back to $channel_name today we're gonna $rephrased_video_title but first if you're watching this now there's a $rand_num(40,60) percent chance you're not subscribed even though you may watch my videos all the time, so please hit subscribe, and remember to hit that bell. and of course if you like the video click that like button, and maybe leave a comment down below - it really helps with the algorithm"