Did you take ~1431 screenshots before the class and another ~477 during the class?
FA Is the exact number of screenshots that you took before the class relevant?
No, FA the number you took during the class?
FAAre all the in-class screenshots of the lecture slides?
Yes one of each slide?
No (edit: probably not, I posted by accident before editing this one out, but meh, no harm asking too many questions

)
Are you taking these screenshots to have a record of the class?
Yes are you taking them at regular intervals?
For svv of "regular," Yes will the numbering somehow help you to identify the screenshots later?
Yes did the class start immediately after the 30-minute period?
No