I strongly suggests you read Bob's first reply here again.
Obviously the one making the video doesn't realize that the Avast protection is based on multiple shields.
And that guy really didn't test the ransomware shield at all.
First mistake he made was not disabling the build in ransomware protection in Windows.
Second huge mistake is not explaining how the ransomware shield is supposed to work.
Sure I can run a test and say it failed or succeeded.
But no mater what I say, it doesn't mean anything if the readers doesn't know what exactly has been tested and how/why.
And what has "Got talent"(?) got to do with the testing ?
Is Simon Cowel ransomware ?