New math channel - need honest feedback!

Created quick math tricks to help students with math anxiety. Looking for pedagogical feedback on the approach.

I'm focusing on visual methods and shortcuts for middle/ high school students.

Questions for educators:

1. Is showing the "why" before or after the trick better?
2. What topics do your students struggle with most?
3. Any suggestions for improvement?

Examples: multiplying by 11, percentage hacks, etc.

[Link in comments for those interested]