Truck swerving while being towed - GIF

[Frank S]

Look at that MAN dance.
Probably a combination of things starting off with worn steering components too much toe in bad steering stabilizer bad front shocks not having a shaft locking clamp on the column shaft where it enters the steering box the tow driver probably just tied a rope to the steering wheel and lastly has the drive axles raised too far off of the ground accentuating the reverse effect of the steering king pin caster angle
Short wheel base trucks can be a real challenge to tow this way.