AS1020 Lab7 Lenses & Telescopes 3 31 2020

New channel Brendan Britton: title sample judged 'whole' (This is a straightforward astronomy professor's recorded full lectures, labs, and homework review sessions for universit); passed a second screen for sellers/exam-prep/re-uploads; 3 of 3 sampled transcripts showed teaching, 0 not; every title checked strictly; oEmbed verified.