What do you frequently see on your social media news feed? Status updates, advertisements, sponsored pages, or videos?

Status updates of my friends and pages I follow, advertisements on rare occassions because I follow only a few pages.

Each individual news feed is different from the other. Your personal news feed manifests according to your friends, the number of pages and people you follow, what you like, comment and so on. So your news feed depends on your Facebook behaviour. If you show interest in more videos, like and share them- then you tend to see more videos. If you follow a lot of people, you get to know their status updates first etc.