My 3rd Gen Apple TV not seeing new Movie on iMAC

Hello - I just added a new home movie into iTunes which is a .mov file and it is showing up as a "Home Movie". I can play it in my iTunes however when I go to my Apple TV, and "Computers", I do not see this movie to play. I have not done this in awhile and wondering if my Apple TV (A1427) and iMAC (mid-2011 model) have gotten too old to play nice with each other. I did sign out of my home sharing account on both devices and signed back in using on both iMAC and AppleTV using the 6 digit code method and that worked fine but for whatever reason I cannot get Apple TV to recognize this new home movie I added not my iTunes "Home Video" library. Any ideas would be much appreciated. Trying to surprise my son with a high school graduation video on the big screen tomorrow.

Cheers,

Eric