Facebook Problem Sharing Video Links

I have recently been having problems with 3 different pages that I manage on Facebook. Firstly if I upload videos I am getting a really low reach on the page it is uploaded on and secondly if I try and share the link on my other pages it will not load a preview so therefore I can not schedule or post it. The videos are Facebook links so using the debugger like I would with normal posts doesn’t work.
Has anyone else had this problem? Any advice would be much appreciated. Thank you.