I have found that memories aren't infallible. Had a date stamp appeared on the footage or if the footage was forensically examined and the metadata showed the "recorded date" I might not be so sceptical. That all depends on the date being set into the videocam in the first place.
SnipThe three pals had been taking part in a challenge to transport a caravan from Faro in the Algarve to Saxony in Germany while surviving on 10 Euros a day, getting truck drivers to tow it.
A pal of Brueckner suggested he could help.
Brueckner drove 300 miles, almost five hours, from Praia da Luz to Malaga, Spain, to pick them up, then drove them for another three hours to Vera, Almeria.
“He was a stranger and decided to drive us,” Tomas said.
"He told us to call him the ‘Happy Hobby Hippy’ because he liked to hang out with people who were hippies.
“When we got there we all hugged him and thanked him and he said he was going on back to Portugal.”
A few days later he messaged them to say: “Guys, enjoy your remaining days with all your heart, because reality will catch up with you very quickly.”
In June last year Interpol quizzed the woman in the group about the trip.
https://www.mirror.co.uk/news/world-news/cheerful-madeleine-mccann-suspects-trip-22447532I think it highly likely that Interpol would have checked the dates.