This instrument is called a "percussion pad" and is similar to an electronic synthesizer.
The percussion pads are usually about eight squares long, and are either finger-tapped or drumstick-tapped. Some MIDI keyboards are equipped with percussion pads, each of which can be freely assigned MIDI channel messages, and MIDI percussion pads have evolved to become very powerful, such as the National Instruments percussion pads, which have a matrix of up to 8x8 percussion pads and can produce a rich percussion sound.
Instrument - Percussion Pad Features:
Direct manual control of Abelton Live's features without setup, 64 miniature percussion pads for triggered clips, drum tones, electric sounds, effects, and more loaded elemental music for creating setups for compelling multicolored light performance videos, trigger clips, audio tracks, and control of sound effects, voices, and signal sends.
Generally USB-powered, the completed compatibility makes it straightforward to use without the need for an external power supply. If you want to play percussion pads, if you just want to simply play, just imitate the video, you can quickly learn a few tunes without music theory; if you want to become a master, in addition to fingering practice, music theory, arrangement and sampling accumulation is essential.