Just saw his videos on Tik Tok and his "Journals". He's 100% a fraud. Two simple red flags for me are his "journals" just sound like someone "writing", if that makes sense. It sounds like someone writing a fiction novel if you will. Rather than just giving straight ahead no BS accounts.
Also his username "TheOnlyRealTimeTravelerOnEarth", it's very "Look at me, look at me". And lasty, he simply looks and sounds like a fraud. I 100% believe Time Travel is real and that it will happen, but this guy ain't a time traveler. If he's simply playing a character then ok I get it, but if he's really trying to pass himself off as a time traveler, then yeah he's a fraud.