Abbilden in eine Koordinatenebenebene, senkrechte Projektion, Matrizen, Mathe by Daniel Jung

Picked video by video from Mathe by Daniel Jung (mixed channel): title plainly names a teaching subject. Channel transcript sample: All three sampled videos lack transcripts, so no direct content could be verified, but titles/descriptions align with the channel's established pattern of short math tutorials, consistent with the prior 'pick' verdict.