Busted the drive gears on two of 'em before. Looks like it might work in milder digging conditions like what is shown.
Trenches are thin so multiple ditches may be required.
What groundsaw was this? Those were always a last resort for crappy conditions. I remember one irrigation guy all but leaving the trade to use his earth saw to carve up pavement for laying in cable TV wires in new developments, in those golden days of yore, prior to the boring missiles being introduced.