I don't think a stereotype can ever really be constructive, even if "positive" since it limits the space for people that don't fit it.
A clear example of this would be that Asian people are good at Maths. Not true, and does a lot of harm to the many Asians who are not exceptionally good at Maths. (For instance that Asian University candidates are often penalised for only having average Maths grades, or just the bullying and social pressure of feeling you're not living up to a birthright.)
I rate both JohntheDuncan and Andrewism highly as not overly wanky Left politics channels.
(No, you don't need to pad the video out with 50 minutes of intercut "plot line" where you fight with a mirror world version of you, who's wrecking havok on the lives of your guest stars who can only be sent back by a tangentially related metaphor to the main topic of the video.)