Help idea's? ???

martin1984

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Took the other half to work this morning around 5/6mile trip then just sat in car in park car was idling and a loud knock/banging. video from inside as when out side the noise of engine was louder should I be worried I turned off for a few minutes then back on and nothing no knock or bang and drove home fine as it's not a constant knock or bang not sure a garage would find anything any ideas or thoughts ??