This study examined YouTube fitness videos and exercise motivation among adults with the aim of determining how exposure to digital fitness content influences motivation to engage in and sustain physical exercise. The study was anchored on Uses and Gratifications Theory (UGT), which posits that audiences actively select media content to satisfy specific psychological and social needs, thereby providing a framework for understanding why adults deliberately engage with YouTube fitness videos for health improvement, self-development, and emotional encouragement. The research adopted the library research methodology involving systematic review and analysis of existing scholarly literature, empirical studies, and theoretical works related to digital media, fitness communication, and behavioural change in order to synthesise documented evidence and identify knowledge gaps. Findings revealed that YouTube fitness videos significantly enhance exercise motivation by providing accessible, flexible, and interactive workout guidance that fits into adults’ busy schedules. The study further found that users actively seek credible and relatable instructors, replay exercise routines for mastery, and engage with interactive features such as comments and live sessions to reinforce accountability. However, findings also showed that although YouTube generates initial enthusiasm for exercise participation, sustained adherence depends on intrinsic motivation, self-discipline, content credibility, and supportive environmental conditions. Challenges such as high data costs, unstable internet connectivity, and exposure to uncertified fitness influencers were identified as barriers to long-term commitment. The study concluded that YouTube serves as an effective supplementary tool for promoting exercise motivation among adults but cannot independently guarantee sustained behavioural change without personal commitment and structural support. Consequently, the study recommended that government and public health agencies integrate verified digital fitness content into health promotion strategies, employers and institutions develop structured wellness initiatives incorporating online fitness engagement, and content creators prioritise evidence-based instruction, professional credibility, and holistic wellbeing messaging to enhance sustainable motivation among adult audiences. Keywords: Adults, Exercise Motivation, Fitness Videos, Uses and Gratifications Theory, YouTube.