The videos summarize information about Japan's Yakuza criminal organizations:
1. They engage in activities like protection rackets, prostitution, gambling, and human trafficking to make money.
2. Historically they did not deal drugs but some members have been charged for drug crimes.
3. Recent laws have aimed to restrict their activities like real estate deals and payments, but they still wield influence.
4. The videos use a variety of techniques like animation, images, interviews and music to engage viewers on the topic.