TL; DR (These are all the claims Oniongroomer state in his vid):

-Starts with disclaimer about Foid's claims, and affirms that her video was her perspective, that she is allowed to feel how she feels about her claims, that the video was intended to be closure between their three-odd months of t. situationship
-Immediately starts with denying le grooming accusations by stating some of Foid's points mischaracterised Oniongroomer, instead pleading retardation instead of malice or anything ulterior, that he is just t. sensitive young man who doesn't know any better
-Denies the early onset of reciprocal flirtatious exchanges with Foid, brings up evidence of 'cord messages dated as early as 12/03/26 where it's Foid exhibiting Celebrity Obsession Syndrome. Starts with joking about pot; she even begs money from him and that she admits to downloading an "Australian clock" to know when not to bother him. The exchanges continue to not be flirtatious, but it appears Foid saw it that way (parasocial) but at the same time Oniongroomer heart emoji'd a tonne of messages between them so it seems that Foid seeing it that way was a no-brainer for two asocialite morons
-Then another screenshot appears where Foid confesses something but 90% of it is redacted and it appears this is how the edating started by him not being able to say no. He admits to continuing such "faux entertainment of things"
-Denies that he suggested Foid move to Perth; states that they were merely 'hypothetical[s for a] better life' in relation to her situation
-Denies the sexual conversations ever happening, showing instead a screenie where Foid demands Oniongroomer says to "Say it back" (I love you). Somehow gets emotionally extorted by a Foid two years his senior and keeps letting it happen by leading her on. Also denies that he planned on adding her in future projects
-T. Dwellercord eventually catches on that Oniongroomer and Foid were edating; no screenshots, server nuked. Admits to being upset, not resentful. Foid leaves server, and sends Oniongroomer an 18-minute VM afterwards that was basically the precursor to her video. It also was, according to him, a suicide note, making him say irrational things to make her not do it (e.g. telling her to delete 'der cord)
-"Don't kill yourself over me" geg
-Oniongroomer affirms she was obsessed; he, again, let it happen, despite his discomfort. He claims he instead told her to take a break from the app, and couldn't fucking do it correctly for some reason
-T. WhatsApp exchanges were Foid's idea, a situation that took place when Oniongroomer was in "a state of alarm and consternation" wordswordswords 
-Joined VC with Foid, finally admits he never had sincere feelings (what he should have done to begin with in the first place); Foid crashes out
-Explains that everything happened at all because he was le newgen to experiencing all of this edating bullshit to begin with (19 year old by el way) and that he is unable to say no (at 19 by el way)
-Explicitly denies the grooming allegations, asserts that his server of groomers state that what he did was retarded (no screenies)
-Concludes that he takes full accountability and apologises to Foid; somehow doesn't acknowledge once he made Foid relapse into her cocaine addiction