Creating Longer Form Videos on Youtube?

Longer form video is really important, and the easiest platform to publish it on is youtube. How often should we publish longer form content? And then what if one video has potentially many little short pieces of content inside of it? I think that's totally duable for most people, especially if it's a 15, 20 minute long video. But again, it really is dependent on your audience. So test everything and then actually look at the data from those individual social channels rather than twub only.