They make 24x24 inch tile. Lay with rubberized calk and no grout lines, use glued joints like granite tops use. Then use oak trim around the edge for a cool look.

Install marble tile countertops with ease.
Good looking Marble top done with 1 ft square tile. Plenty of other suggestions there as well. Concrete counters are interesting but look to be a lot more difficult and not sure of durability.
I bout some granite tops cheap and found a reasonable installer, still much more than a do it yourself job but no way I can handle a 6 foot piece of Granite. You hubby might.
I watched the video, looks nice. We considered concrete as we have a concrete expert, my husband’s brother, in the family. He does everything from buildings to stamped concrete patios and kitchen counters. The guy is amazing and very talented. Ultimately decided that concrete is just too porous and high maintenance.