A masked man parading an ISIS flag has filmed himself walking straight across the German border as he taunts officials over the non-existent security checks.

The uploader, calling himself Vlad Tapes, said he published the video 'to show how pathetic the border is' between the two countries.

It was posted in the wake of the Berlin terror truck attack, during which the German officials were criticized for allowing killer Anis Amri to roam out of the country undetected.

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Danish citizen filmed himself walking across the German border in a video uploaded online

The uploader, calling himself Vlad Tapes, said he published the video 'to show how pathetic the border is' between the two countries

It was posted in the wake of the Berlin terror truck attack, during which the German officials were criticized for allowing killer Anis Amri to roam out of the country undetected

'A Danish citizen dressed up in Islamic State gear, flag and fake gun to show how pathetic the border is between Germany and Denmark,' the uploader writes.

'We test border controls. Can an Isis terrorist cross the border unnoticed?

'Border controls were non-existent. Do you feel comfortable with our open borders?'

The unverified video shows the border is unmanned as the balaclava-clad man walks slowly through the countryside.