In developed countries (such as Japan and the United States), intestinal parasites have almost disappeared. Roundworms and hookworms have been eradicated. Nowadays, the only time you might encounter anisakiasis is when traveling abroad or eating raw fish. The 1-meter-long "worm" in the video is fake, just a mass of mucus expelled during a bowel cleanse. If you live a normal life, there seems to be no need for concern.