Your switch needs much much more push than that. You need to adjust the smaller blade (static) towards the larger blade (actuator blade). I see hardly any movement at all. This switch should stay closed for longer. When switches like these contact, they are supposed to move together, and this allows for the switches to clean themselves. They are self cleaning, and if they don't press well against each other, they won't clean.
They should open at the End Of Stroke, that's why they are called E.O.S. switches, not at the beginning of stroke...which is what yours does.
A general rule of thumb, if you can see a switch push against another switch, it's probably making good contact. If you don't, it probably isn't.
The EOS allows for a holding circuit in the odds relay coil, which will stay on until the odds step up coil has time to fully pull in. Then, when it is fully in, the EOS opens, and the holding circuit drops out, ensuring you have a full step on the solenoid. I think I mentioned the page this circuitry can be found on in your bally manual a few posts ago.