I agree with LeeD. I'm not saying you get better results from the backhand - you say you hit better angles with the forehand, more consistent, etc., and I believe you when you say that. It's your experience, after all
I just watch the strokes themselves and the backhand looks better to me technique-wise. I agree with LeeD that you seem to hit it pretty cleanly.
I think that most errors for people with 1hbh tend to come from footwork and lack of setup more so than technique itself. Your technique looks good to me. Talking about the topspin backhand, here - the slice seems a little choppy, somehow. It would be cool if we could see both topspin and slice backhands in match play on your next vid, and see where they work and don't work for you in points.
But the fact that we're talking about which stroke is better, and stuff like that, is enough to see that you're well above 3.0.