This video is a cartoon animation featuring three characters on a stage. The stage is adorned with a purple background and a sign that reads "What's This? What's That?" The characters include a blue monster, an orange monster, and a green monster. The blue monster is holding a microphone and singing, while the orange monster is dancing. The green monster is also dancing and singing. The stage is decorated with colorful confetti and stars. The characters are wearing costumes and appear to be having a fun time.