I don't think ViewPure counts as a YouTube client. It just embeds a YouTube video, which is enough to strip away the YouTube clutter, but it's not reimplementin

I don't think ViewPure counts as a YouTube client. It just embeds a YouTube video, which is enough to strip away the YouTube clutter, but it's not reimplementing the YouTube player's JavaScript code the way invidio.us does, for instance. I could be mistaken but I don't think YouTube officially permits third-party clients of any sort. Perhaps that's a good litmus test.