A video being shared online has falsely said face coverings do nothing to stop the spread of the novel coronavirus and will instead deprive the brain of oxygen, causing damage to adults and developmental issues in children.
The 55-minute video, uploaded to Bitchute, features known British conspiracy theorist David Icke (here, here) and his son Gareth, who discuss topics including the effect of face coverings during the COVID-19 pandemic, masculinity and censorship. Among other claims outside the scope of this check, the pair says several times throughout the video that face coverings can cause brain-damaging oxygen deprivation.
Icke begins by quoting a video from German doctor Margareta Griesz-Brisson, the founder and medical director of the London Neurology and Pain Clinic (here), who questions the safety of face masks. The original video has been removed from social media, but can still be viewed in German (here), and with an English translation (here) .