It's not crazy to believe Tinashe is hella Aquarius, because her first album is called Aquarius, as well as most Aquarius see them self as futurist, and lot of Tinashe albums deal with the future.
Saturn in her midheaven can also explain delays in her career and these difficulties is what ultimately makes her stronger. I think the astrologer in this video should have not only look at the placements but the aspects as they too influence how the planets function.
