23 - Mecánica Teórica [Reformulación del oscilador armónico]

New channel Javier Garcia: title sample judged 'pick' (Overwhelmingly rigorous physics/math courses and derivations, but a handful of uploads (short films, interviews, channel); passed a second screen for sellers/exam-prep/re-uploads; 2 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.