According to the channel, the videos that prompted the censorship included 'debates around whether masks were effective and whether lockdowns were justified when considering their adverse health outcomes'.
And it cited its commentators who claim 'masks are not effective in containing outbreaks, particularly when mandated outside in the fresh air' and take issue with 'the frequency and mechanisms of locking down Australians.'
It pointed out the science on both of these matters is not resolved.
While studies issued by the Lancet suggest a mask stops up to 80 percent of droplets from being discharged into the air, researchers in Denmark discovered there was no statistically meaningful difference in the number of people who contracted Covid while wearing masks in public compared to without.
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The move comes as Australia's 'Zero Covid' strategy that tries to fully eliminate the virus shows signs of buckling.
Professor Bruce Robinson, chairman of Australia's National Health and Medical Research Council, admitted that the country's chance of successfully eliminating the Indian Covid variant was 'close to zero'.
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He explained: 'The chance of eliminating this is close to zero - there are many people I have spoken to who share that view. We might suppress it but we will be really unlikely to eliminate it and that's because we see people who are clearly infectious without knowing it and they're out and about.'
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YouTube's move came after a review of posts uploaded by the Rupert Murdoch-owned TV channel, which supposedly posted material that 'could cause real-world harm' to its 1.86 million YouTube subscribers.
YouTube announced it had 'clear and established Covid-19 medical misinformation policies based on local and global health authority guidance'. A spokesman told MailOnline today that it 'did not allow content that denies the existence of Covid-19' or which encouraged people 'to use hydroxychloroquine or ivermectin to treat or prevent the virus'.
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Sky News Australia explained it had discovered old videos that did not comply with YouTube's policies and took its 'commitment to meeting editorial and community expectations seriously'.
Though, it denied any of its hosts had ever denied the presence of Covid and its reporters warned the move was an attack on press freedom and free speech. The ban could affect Sky News Australia's revenue stream from Google.
Its posts, including some questioning whether there is a pandemic and the efficacy of vaccines, are broadly shared on social media forums around the world that spread virus and vaccine misinformation.
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