京都大学 数理解析研究所 第42回数学入門公開講座「 Frobenius写像の周辺」越川 皓永（数理解析研究所 助教）2021年8月4日 第3回（全4回）

Picked video by video from Kyoto U OCW (mixed channel): title plainly names a teaching subject. Channel transcript sample: All three samples are substantive academic lectures/seminar talks (IT management course, bio-sensing research seminar, language-education colloquium) rather than ceremonies or promos, supporting a pick verdict with per-video selection.