Daniel is a side character whose first on-screen appearance as himself was at the end of Healthy Eating, in which it was revealed that he had been playing the Fake Slendy from the first few videos. The Hybrids state in the video Public Service Announcement that they have no plans to parse the videos and point out to the audience which appearances of Slenderman where real and which were faked, so we will probably never have confirmation about which appearances are Daniel and which are the real Slenderman.