Following all the recent data-related scandals, Facebook introduced a new feature enabling anyone to see which ads are run by any business page on Facebook.
Update: a few months ago there used to be a link called INFO & ADS at the bottom of each Facebook page's side bar. It's not there any more.
Now if you want to see which ads are run by a specific Facebook page, you have to head to Facebook Ad Library at https://www.facebook.com/ads/library
There you'll type in the name of the page you're looking for, e.g. Facebook Business
And you'll see all the ads they are running, for each territory.
It used to be easy to see the view count for each video, even the likes and other reactions but Facebook has de-activated a few access features.
Nevertheless, you can use another free service to go into more details, it's called BigSpy (and is not endorsed by Facebook).
You will even have direct access to the URL of the ads, e.g. https://www.facebook.com/BusinessMarketingIN/posts/2333235096965272
Have fun spying on your competitors' Facebook ads.