added information about randomization to mathlang video README.md
added information about randomization to mathlang video README.md

hbp-brain-charting/public_protocols,hbp-brain-charting/public_protocols,hbp-brain-charting/public_protocols,hbp-brain-charting/public_protocols,hbp-brain-charting/public_protocols,hbp-brain-charting/public_protocols