"I can't even believe I'm addressing this, this is ridiculous, but let's just make this as easy as possible," Clayton, 28, said in the video, according toUs Weekly.
Clayton also revealed his iPhone settings, which appeared to prove his location on Friday was Mountainside Fitness in Arizona, not in New York City.
"People that make these false accusations should be held accountable," the Missouri native and former college player wrote in his caption. "Trying to gain clout by ruining a relationship is embarrassing and extremely immature."
Clayton reportedly claimed he was in Arizona with his brother Nate Echard.
Clayton also went as far as to message the woman who had started this rumor. He shared a screenshot of their social-media exchange and the woman allegedly wrote that Clayton's "proof isn't proof."
Clayton apparently replied, "Hope you learn a valuable lesson through this. Not all publicity is good publicity."
Susie also reportedly had Clayton's back when she wrote in a comment via Instagram on Sunday, "Lmao I know that man loves the sh-t out of me. He would never."
The Bachelorette alum Michael Allio also rushed to Clayton's defense given he had been hanging out with Clayton and his brothers this past weekend in Arizona.
Michael, 37, said in an Instagram Story video shared to Patrick Echard's Story, "It does not add up: there are receipts [and] Clayton is a good human being," according to the magazine.
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The Season 17 The Bachelorette suitor and single dad insisted it's "wrong" of fans to even give this rumor attention and comment.
"I know him [and] he's a friend of mine. This is the flip side of what people do not see, which is, anyone can make these false accusations against you. You can't defend yourself," Michael said.
"Their comments hurt people's character," the Ohio native added, "they disrupt people's lives [and] they should not be entertained."
Clayton reshared Michael's post onto his page and wrote alongside it, "Thank you brother. Having people like you in my corner means a lot."
Bachelor in Paradise 7 alum Noah Erb also slammed the TikTok user and reportedly wrote on his own Instagram Story on Saturday, "Poor girl needs to be told she was catfished and that man was in fact not the guy from Bachelor."
Clayton told Us in March that his romance with Susie, a wedding videographer from Virginia whom Clayton said he was "the most" in love with at the end of his The Bachelor season, was thriving.
"We've talked about it and we know from here on out, like, this is a relationship in the real world where you never know -- anything can happen and we're aware of that," Clayton explained.
"We're gonna give this every chance that we can. We love each other. And as of right now, we're both very, very happy. But relationships take effort. They are hard at times. And so we know that there's gonna be those moments that lie ahead."
He continued at the time, "There's never any guarantee in life, but with all that being said, I am incredibly happy to be with her. I'm so excited to be able to just go get dinner, to go hiking, do all these things with her, travel."
On The Bachelor's 26th season, Susie happened to be Clayton's third Fantasy Suite date of the week, and the pair mutually agreed she should leave the show in a tense and heated breakup discussion after she learned he had slept with both Gabby Windey and Rachel Recchia.
Susie was upset about not being Clayton's one and only considering he had also professed his love to the two other women, and Clayton was angry Susie didn't seem willing to fight for and save their relationship.
Clayton therefore introduced both Gabby and Rachel to his family, which helped him determine that he only wanted to be with Susie, a "once-in-a-lifetime woman."
Susie ultimately returned to the show and made an appearance at the Final Rose Ceremony, but she dumped the Bachelor instead of accepting his final rose. Susie said at the time that Clayton wasn't her person and they didn't seem meant to be.
However, Susie reached out to Clayton post-filming seeking some answers, and the pair reconciled and are now dating and in love in the real world.
Clayton recently told Us that he was truly convinced he was in love with three women during the Fantasy Suites but now he feels differently.
"As I've now taken the time to reflect and look back, I believe that I had gotten to the point where I was falling in love with everybody but then it got to the point where I was only in love with Susie," Clayton claimed.
Clayton said he now believes you can only be in love with one person and so he must have just been "falling" for Rachel and Gabby.
"That's where I made a mistake. I was confused on the show," Clayton acknowledged.
Clayton said the confusion settled in his heart because he had really attempted to adapt to The Bachelor's unique and unconventional environment while filming, which allowed him to compartmentalize his relationships and progress each one quickly and meaningfully.
"It was unchartered territory and I did make a major, major mistake of assuming, 'Okay, this is how things have operated from what I've heard. I'm sure the women are aware of how things work here, so maybe it's a little different from the outside world,'" Clayton told the magazine last month.
"But what I came to realize is some of the women still had the mindset -- and rightfully so -- like, 'This is the way I date. I'm dating one person.' These women were dating one person and I was dating 30, so that's where I think there was a contrast."
Clayton admitted he should have asked the women more questions in order to understand their point of view.
"We have kind of come to the conclusion that I was living with my real-world expectations, and there's nothing wrong with that," Susie agreed at the time.
"And Clayton adapted to, I guess, the process and dating multiple women. He acted in a way that many Bachelors before have... What we could have done better was just have more empathy for each other and be able to understand the other person's perspective while we were in that moment."
Susie said she and Clayton were simply "living in different realities" when The Bachelor was taping late last year.
"We've since been able to come to the same reality. But when you're there, it's such a tough environment and we're just fortunate that we are able to get to the other side and be so happy and confident where we are now," Susie shared.
After The Bachelor finale aired, Clayton moved to Virginia to be with Susie and give their romance a real shot. He had quit his job in medical sales and even sold his condo.