My little creek isn't even a blue line, and is seasonal about 4 months out of a year. It looked larger than your video on a much steeper slope 2 weeks ago after a true gully-washer.
Luckily I am fortunate enough to have a means to divert the chocolate cake batter flow away from the pond between driveways, but it was even more than that could take, which is a lot, so I lost a portion of my gravel driveway.
