Those look more like Chapman's or Damara Zebras. They lack the dewlap, and the typical "grid" pattern on their back. Also the stripes extend under the belly, a feature not found on any zebra other than Equus quagga.
Hi Dibatag! Thank you for your reply! I think you are right, now that I'm paying more attantion to the pattern of the stripes. I'll edit the title. Thank you!