I don't know what you do for a living but I will guess that it isn't sales. A nine minute video may not work for every demographic.
I'm starting to hate YouTube in a way. On the one hand, I see videos that I would NEVER see otherwise, and idiot politician gaffes are captured forever so that they can't deny them. On the other hand, so many links are to poorly produced, grainy videos that are five minutes long and have a minute or less of actual content.
That would be OK, but the issue is that YouTube videos are sequential search, while a printed article is random search. I can scan the article and see if it's worth my time or not. I can't do that with YouTube. I can drag the progress button over to a different part of the video, wait until the streaming bytes catch up, and see if that section is worth my time. Usually it's usually not.
YouTube is great if you have unlimited time, and IF you have something worth posting. In many cases, YouTube, IMHO, takes the place of taking the time to write a coherent essay that actually has some content to it.
I write and teach.