The Kodokan and IJF developed short 60 second teaching videos.
The Gokyo no Waza (five sets of techniques) is the standard syllabus of Judo throwing techniques originated in 1895 at the Kodokan in Tokyo, Japan
“Osae komi waza” (Hold-down techniques) is one of Katame-waza (grappling techniques) and consists of covering the opponent with your body, etc., to prevent them from escaping.
“Kansetsu waza” (Joint locks) consist of using one’s own legs, arms, and knees, etc., to grasp the opponent’s joint (elbow, knee, etc.), and bend it in the reverse direction to lock the joint.