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One day I'd like to be famous enough that I can put fake ads of vtubers I'm friend with when I go to the toilet.
A bit like the CMs in Ponpoko's 24 streams. They're not really ads per say, they're more like a shitpost video to promote your channel.
For example if we picked DrKonrad as an example, his video could be him meowing until he gets cat good, and then his channel name is displayed at the end.
A bit more subtle than a channel introduction video.