An advertising campaign that explores the casual racism of Australians towards Indigenous people has been viewed more than 3.75 million times, but 20 per cent of respondents to a beyondblue survey still think it is OK to discriminate against Aboriginal and Torres Strait Islanders.

Beyondblue's "The Invisible Discriminator - Stop. Think. Respect" video highlights research by the charity that found one in five young Australians would move if a person of Aboriginal or Torres Strait Islander descent sat next to them and the same percentage would keep an eye on an Indigenous person if they were shopping.

After the campaign was launched, beyondblue commissioned an independent evaluation by market researchers TNS, the results of which were released on Thursday.

The evaluation found that up to 21 per cent of respondents who had seen the scenarios depicting subtle discrimination in the video still thought the behaviour they depicted was acceptable, while 70 per cent agreed that "almost everyone has been a racist at some point in their lives".