First YouTube is free. YouTube reaches one billion people. PPC YouTube can come in at 5 cents or lower per view.
Gyms are in a category that is perfect for YouTube. Member testimonials are very powerful. Demonstrations (be a thought leader and offer free quality content). Instructional events (nutritional speakers, fitness exporters, weight management and other events).
Posted YouTubes are great free organic SEO right next to blog posts.
YouTube PPC programs can target by keyword, targeted youtube channels and other audiences.
You can use your phone and just upload. There are some nice free tools like Magisto that can help you edit and add music and effects.
YouTube video is easy to do and load. Do it now.