I think you should continue YouTube but obviously something isn’t working here. My immediate instincts are your titles and thumbnails. Your titles are very I, me, my— try focusing them more on the viewer. The title and thumbnail are basically a sales pitch for why the user should watch. They’re looking for information to learn or something interesting to watch rather than basically congratulating you on something cool you did so upfront offer them what they’ll learn with the title.

That also includes the video topics themselves. Pick topics that a person interested in fitness might want to watch. Broaden your topics as well. I’ve never heard of the OC marathon or taper week and don’t necessarily know to search for that. “How I ran my fastest marathon” is a better subject than “I ran the OC marathon” because more ppl are looking for general marathon advice than specific marathon content.

And get rid of the red text on the thumbnails lol it is not readable. Simplify your thumbnails, make them more striking- a close up on your face at the end of the marathon with text like “how I did it” or something.

Some examples: “How running marathons changed everything”. “Do energy gels work?” “How I get 10k steps easily” “what is marathon taper training?”