The former children’s presenter, 84, was found guilty yesterday (30 June) of 12 counts of indecently assaulting four girls dating back more than 40 years, with the youngest of victims aged just seven or eight years old.
One of the victims was a childhood friend of his daughter and another was an autograph hunter.
"It just makes you feel that reality is very muddled and confusing, like you have to revise your own childhood," said Brand on his YouTube channel.
"That's an integral part of your own life you have to look back and go, 'Oh right, so what was going on then then, when I was watching cartoon club and enjoying that stuff?’
"You have to revise your narrative."
He describes the case as a "graffiti over our grasp of what is real".
"On one side of the story you've got the victims, which are obviously human, and real," he said. "And then on the other side you've got Rolf and his family that are human and real.
"With Rolf Harris newly cast as a villain it creates this uneasy moral climate of nihilism. He's like a graffiti over our consciousness, a graffiti over our grasp of what's real."
Rolf Harris: A life in pictures
Rolf Harris: A life in pictures
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Rolf Harris in 'Stars on Sunday' TV Programme (1969 -1979)
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Rolf Harris and his daughter painting a wall together, 1967
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Rolf Harris on the 'Rolf Harris Show', 1973
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Rolf Harris in 1968
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Rolf Harris smiles during the 'The Rolf Harris Show' in 1973
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Rolf Harris with art book he wrote for children in London, 1978
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Australian entertainer Rolf Harris gets ready to blow his didgeridoo to promote a concert at Central Hall, Westminster, staged to raise money for research into cancer in children at the Royal Marsden Hospital.
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Rolf Harris sketches a picture of Bambi, 1986
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Rolf Harris and his wife at the David Frost's Society Party in London, 2001
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Rolf Harris performing at Glastonbury 2010
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Rolf Harris performs in 'The Rolf Harris Show' in 1973
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"Rolf Harris" book signing in London, 2010
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Rolf Harris with his portrait of the Queen at a London art gallery in 2010
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Rolf Harris at the Daily Mirror's Pride Of Britain Awards 2012 in London
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Rolf Harris and his wife Alwen attend the Press & VIP preview at The Chelsea Flower Show at Royal Hospital Chelsea in London, 2010
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Rolf Harris surrounded by media leaves City of Westminster Magistrates Courts in London, 2013
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Entertainer Rolf Harris and his wife Alwen Hughes (L) arrive at Southwark Crown Court in central London, 6 May, 2014
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Rolf Harris is surrounded by members of the media as he leaves Westminster Magistrates Court, in central London, 2013
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Rolf Harris arrives at Southwark Crown Court in London, 27 June 2014
Harris will be sentenced on Friday 4 July. Brand says that there was always something "inherently comedic about Rolf Harris, who was always seen in such a lighthearted context, those silly shirts, silly instruments, silly frivolous drawings around children and adolescents; novelty songs".
"It contributes to this idea that nothing that we stand on is firm ground," continued Brand. "There’s a horror; an uncanniness to it."