Yaswanth Mangalagiri

 One million views can make you earn $300 - $ 1000. So what are the deciding factors. Subscribes Total watch hours or minutes Subscriber count

Group Admin invites the User with link.   The User opens the discussion page and sees the Join Group Button  user will request to join the group and his request will be declined After the user reloads the page he'll be shown with No Content  page. But the user can send a request to join from the Discussion page.  

 Page editor cannot see the crossposting Page in the Page Settings. But he can use a HTTP Post Request to send an invitation

There's an annoying feature on Youtube it's called End Screen. When the video is about to end there would be thumbnails of videos that occupy the entire video, giving you a bad experience.  The End screen of any video can be crafted from YouTube Studio The End Screen button opens up a popup that displays radio button, that lets you choose a video that is in your uploaded vidoes.  If you video is private, it shows that The video is private and will be replace with some other video. Now if the video is unlisted it allows you to happily add it in the end screen without notifying that it's an unlisted Video.

Your requests seem to be a success but what happens if the totally out of the world scenarios. Don't get fooled by the 200 OK response for Insecure direct object reference.