Part of me wants to love video modes. I love retro games so much. And a video mode hearkens back to retro games. AFM is basically an Space invaders clone... There might be other old school games where it actually more closely resembled it. But, those were based off of Space Invaders.
And the pinball fan inside me wants to really hate video modes. Because, it takes you out of the game, doesn't offer much, and even "if" it was fun it goes by too quickly.
So I really don't think they're necessary.
But, when I get one, and maybe its a hard to get one(for me at least), I actually am excited to play it. So I guess I"m just confused by them to be honest... But, I think they can add to a games charm if they're incorporated right, as I know I cheer my friends and family on when they get them, and I enjoy watching the animations as a spectator...
So I think for me its a yeah, they suck... But, they can also be fun... Now lets play pinball!!!!