Some Malayalam production houses have learned to bypass this. They film original scripts inspired by 123 GO. Legally, you cannot copyright a "genre" (e.g., a DIY hack video). As long as they use their own actors, sets, and scripts, they can call it "123 GO style" without getting sued. However, they often use the exact same thumbnail layouts and logo colors to confuse viewers.
If you are a viewer, enjoy the idea of Malayalam life-hacks, but be a conscious consumer. Don't support channels that clearly steal content. Encourage the few legitimate creators trying to build original "Smart vs Dumb" skits in Malayalam. And parents, watch with your children—ask them, "Is this real? Would a teacher really not notice this?" Critical thinking is the best hack of all.