Tutorial on Geometric Relationship between Lines and Planes

Round-16 hunt: picked; source: named-course long-video search (r16 wave 4); channel screens (sellers/exam/re-upload/devotional/vendor/events), provenance check, vendor/seller/devotional recheck and quality tier B passed; strict per-title check + final strict pass; oEmbed verified.

A 38-minute video from Yang Cao: “Tutorial on Geometric Relationship between Lines and Planes”.

Video by Yang Cao, played through YouTube's embedded player.