"Otaku no Video" is a two-part OVA series that blends documentary-style footage with a fictional narrative to explore the otaku subculture in Japan during the 1980s. The story centers on Ken Kubo, a college student and former tennis team member who reconnects with his childhood friend, Tanaka, an avid otaku. Through Tanaka, Ken is introduced to the world of anime, manga, model kits, and other facets of otaku culture. Initially hesitant, Ken gradually becomes immersed in this subculture, eventually embracing it fully and adopting the nickname "Otaking."

The narrative alternates between Ken's personal journey and mockumentary-style interviews with fictional otaku characters, providing a satirical yet affectionate portrayal of the otaku lifestyle. As Ken delves deeper into the subculture, he faces challenges such as societal judgment, financial struggles, and the complexities of balancing his otaku passions with real-world responsibilities. Despite these obstacles, Ken remains determined to achieve his dream of creating the ultimate otaku haven, a theme park called "Otakuland."

The series juxtaposes Ken's fictional story with segments titled "Portrait of an Otaku," which feature exaggerated and humorous depictions of various otaku archetypes, such as anime fans, cosplayers, and collectors. These segments serve to both entertain and critique the extremes of otaku behavior, offering a multifaceted view of the subculture.

Ken's ambition to become the "Otaking" drives the plot forward, culminating in his efforts to establish Otakuland and unite otaku worldwide. The series concludes with a surreal and ambitious vision of the future, where Ken's dream is realized, and otaku culture achieves global recognition. Through its unique blend of fiction and mockumentary, "Otaku no Video" provides a comprehensive and engaging exploration of otaku identity, aspirations, and the challenges faced by those who embrace this niche lifestyle.