Am I able to upgrade the video card on this computer?

You'll need to find out what power supply came with the PC (can't see it listed in the spec's)

you may need to take the side panel off the PC case and read the label on the power supply

You'll need to know the make and model number and preferably the wattage on the +12V rail (s) and how many amps it can supply on the +12V rail(s).