wow, I stopped watching it like a minute in lol.
I have played both series, first started with COD. It just depends on what you think the standard is for the best FPS game.. You could be like "Oh Battlefield is better because it has more variety of weapons, vehicles, and more realistic" which is true... COD is more about the player MORE power to the player,(AND DONT GET ME WRONG DICE TAKES CARE OF IT"S PLAYERS WHEN THEY COMPLAIN) but that's why you see the million perks COD Ghosts has to offer. The game revolves around people..
I don't have a favorite, but I play both, I think Battlefield is more tactical, and more realistic warfare experienced.... and COD for me is just like a run n gun based game...