If you who wish to memorise the Dua that the end of the clip it is read as follows... Allahuma inni audhu bika min adhaab an Naar wa min adhaab al Qabr wa min sharil fitnatil mahya...
What does it mean? Imam is saying something in the last prayer, everyone says, "Ameen". What did he say? Then more and they say, "Ameen". And then several times...