A Ural 375D & 4320 can cross a middle sized river so the current fording depth of 0,8m for the 375 and 0,9m for the 4320 isnt realistic, both can cross 1,5m deep waters easly!
He is saying "So the fording depth is there" for the 375D:
https://youtu.be/AWzSghwGHcQ?t=311
Fording Ural 4320:
https://youtu.be/PY5_EXlq6oc?t=34