The microinjection needle was too far away from the field of view when you started. You are not making enough lateral movements with the needle holder to move the needle shadow into the field of view. It takes practice. I find the needle, but it is trashed. You lowered the needle to fast and it broke on the coverslip.
Nothing flows out the needle.
The pressure is too low. Increasing the pressure may remove the block, if not start again with a fresh needle. Focus on the tip of a needle, positioned slightly off of the coverslip. You should be able to just see the flow. When I pull out my microinjection needle the cell surface is pulled with it.