you need to put up pics of their dorsal fins as far as I am aware this is the most reliable method
its to do with how long the rays are in the fin but wait for others to help more
First I'm not expert but I do have a breeding pair of rams. The second fish in the video (from the start) looks female to me, rounded belly and fat breeding tube. The second one, the one mostly on the right side, I can't really tell.
Just saw second video and again, it is the second one that looks female to me.
This link's pretty informative and might help you decide yourself. It's pretty difficult to try and assess from what can be seen in your videos - not that they are bad or anything, just that it can be difficult to check/compare all of the potentially indicating features even if you have the tank right in front of you!