How wide would an A330's wingtip vortices be around a minute after landing?
Vortices of large aircraft often move laterally at speeds of 2-3 knots when they sink to within 100-200 feet of the ground.
In calm wind conditions, vortices created by large aircraft during landing operations can remain for many minutes over the normal touchdown area. They can also slowly drift from one runway to a nearby parallel or crossing runway. (NASA; emphasis mine)

and


Source: FAA

Using the two pieces of information above, the vortices start moving laterally at say T+15'. At T+60' (45 seconds later) they would have covered a lateral distance of 150–225 feet. In windier conditions they would travel farther downwind but dissipate quicker.
The day the video was taken (July 23rd, 2016) there were winds in daytime but almost all the reports having the direction variable, e.g.:

EDDF 231150Z 03005KT 330V110 9999 BKN023 SCT080 24/18 Q1017 NOSIG=

Assuming for the sake of simplification that the variable wind lessens the travel/dissipation, and plotting 650 feet (225 each direction + ~200 feet wingspan) on Google Earth on the affected runway, this result is shown below.

The core is surrounded by an outer region of the vortex, as large as 30 metres in diameter, with air moving at speeds that decrease as the distance from the core increases. (CAA New Zealand via skybrary.aero; PDF)

For the core diameter above, that would be a radius of ~50 feet at each end for a large plane.


About 3,200 feet down runway 18