Skipping sound and poor extrusion

I have found with my prints that the extruder is skipping and when it does it creates a very poor product.

When the extruder starts to extrude you can see it push the nozzle down (or everything else around it is moving up) and when it makes the skipping sound you can visually see it popping up and down. It didn't do this for the first part of the print and then as it got near the end it was almost non stop.

I assure you my bed is correctly leveled, Im using good filament, PLA with thier slcing programs default settings for PLA. Correct nozzle size too

So far this printer and software has been nothing but a pain for me to use... Starting to regret my purchase.

If anyone knows what might be happening please help!! I attached a video