Depends on how big of an audience you want. I honestly think the biggest audience would be here. On youtube you'd most likely get 0-10 views, and there's a chance they'd delete the video if it got any more popular. On reddit they'd most likely delete your post within minutes/hours. You could create a blog and post there, but again there's a big chance that no one would see the post. You could post a video on Vimeo or dailymail or some place else, but again, you'd probably not get any views.
If you want more than one person to see your note, it would be best to publish it here. Or you can post it elsewhere and then link it here.