@arniep My app produces audio cues to do a series of exercises, so exercises have names attached to them for text-to-speech feature, as well as a video of the movement for each exercise, which I spent enormous amount of time to record and edit.
HOWEVER, when I presented the app to some basketball coaching stuff what they asked first was if they can make their own exercises and videos. Every single coach, first question.
It was very clear to me that a standard in sports is not a thing at the moment. It's all about personalisation and everyone seems to want different.
So I provided the custom library. They can enter all exercise features except the video.
I was collecting custom videos for a while end was including them in updates. It turned out to be complicated and unnecessary to have videos for personal exercises.
Hope this helps.