Extruder drive cog slipping on filament
These symptoms are generally caused by friction in the extrusion path.

First, you should make sure the spool of filament can unspool freely.

Second, in order to prevent slipping of the filament, you should consider increasing the force of the roller bearing onto the filament and extruder wheel, or increase hotend temperature. A (partial) clog can also be causing this. You could try a "cold pull" or "atomic pull" where you heat up the filament to print level, push a little through by hand and let the nozzle cool to about 60 % of the printing temp and then steadily pull the filament out of the hotend, this should remove all gunk inside, repeat if necessary. A too low of a layer height can also put the filament extrusion under pressure.



As an aside, slipping of filament is often accompanied by an audible clicking noise. There are a few questions on this topic.

It also looks as though your bed is not centered in the middle as you are printing outside the bed limits in the front and have a little room left at the back!