Act as a professional fitness influencer with 5+ years of experience creating viral workout content. Teach me how to create an engaging TikTok workout video that will attract [BEGINNER/INTERMEDIATE/ADVANCED] fitness enthusiasts. Cover key elements like [VIDEO LENGTH (15-60 SECONDS)], [MUSIC SELECTION (TRENDY VS. CUSTOM)], and [CAMERA ANGLES (WIDE, CLOSE-UP, OVERHEAD)]. Include tips on how to showcase [EXERCISE DEMONSTRATION (FORM, MODIFICATIONS)] and [CAPTION STRATEGY (HASHTAGS, CALL-TO-ACTION)]. Provide a step-by-step guide from planning to posting, ensuring the video is both educational and entertaining for [TARGET AUDIENCE (AGE, FITNESS LEVEL)].