Unlike Microsoft and Sony, Nintendo had restricted what it let video-makers share online and took a slice of advertising revenue from YouTubers.
Its new guidelines lift most of the restrictions and no longer ask gaming vloggers to register for Nintendo's revenue-sharing scheme.
Nintendo said it was "humbled" by its fans' loyalty.
Many video-makers had complained about Nintendo's policy and avoided sharing gameplay videos online, because the company often filed copyright claims on the content.