A couple of points about these marks in the grass:
The straight track seems v. unlikely to be the nosegear. Even if we accept that it's possible for a nosegear track to deviate outside the track of the mains, it would surely be miraculous for it to be dead straight while the mains are carving an S turn with no sign of sideways skidding. Much more likely to me is something breaking free and continuing in a straight line.
The straight track, on the aircraft's right at this point, starts at the same point as the first deviation to the right. Can we postulate a single cause for both? For example (pure guess) the right thrust reverser deploying on command and the ground ripping off the lower part of the reverser?
[Caveat - no professional knowledge influences the above!]