YouTube has removed the official conspiracy theorist David Icke channel from its platform.
Google's proprietary video clip service acted after repeatedly warning Mr. Icke that he violated his policies by publishing misleading information about the coronavirus pandemic.
However, the company will still allow videos posted by others featuring Mr Icke to remain live, as long as their content doesn't break its rules.
A similar ban follows from Facebook.
"YouTube has clear policies that prohibit any content that challenges Covid-19's existence and broadcast as described by WHO and the NHS," a spokesman told the BBC.
"Due to the continued violation of these policies, we have closed David Icke's YouTube channel."
Mr Icke's YouTube channel had over 900,000 subscribers at the time of his removal. The last clip he released on Friday - about his Facebook ban - had around 120,000 views.
Last month, a streaming interview with Mr Icke published by another account prompted YouTube to ban all conspiracy theory videos that falsely link coronavirus symptoms to 5G mobile networks.
Subsequently, the technology company went further by prohibiting any material that:
- suggests that coronavirus does not exist
- contains non-medically proven diagnostic advice on the virus
- explicitly disputes the effectiveness of the guidance on social removal and self-isolation that has been issued by WHO and / or local health authorities
Some civil rights groups have previously expressed concern about "a growing online censorship of the coronavirus pandemic" by major social networks.
"It's through a free forum of ideas that citizens understand, contextualize and trust information, not through harsh restrictions on sharing information," they wrote on YouTube on April 16.
But the latest move was welcomed by the Center for Countering Digital Hate (CCDH), a UK-based think tank.
He said that Icke's videos of conspiracy theories have been viewed about 30 million times on social media.
"We congratulate YouTube for bowing to pressure and taking action on David Icke's channel," said CCDH general manager Imran Ahmed.
"However, there remains a network of dark channels and amplifiers, which promote the content of Mr Icke [and] must be removed. "
The CCDH is now urging Twitter and Facebook to take similar actions.
