A feud between brothers and YouTube stars KSI and Deji has continued to grow in intensity as the two fight in public.

The dispute between the two came to the fore after Deji posted a video accusing his brother of mental and physical attacks on him. In a 46-minute video titled only "bye" and posted on his personal YouTube channel, Deji accused his brother of hurting and upsetting him, as the two grew their YouTube presence.

In the wake of the allegations, KSI's YouTube following has plunged dramatically. He has lost tens of thousands of subscribers, according to the site SocialBlade, apparently in response to the claims made in Deji's video.

It is just the latest instance of YouTube stars fighting in public about allegations against someone they are close to, made in a high-profile video. It comes just days after a feud between James Charles and Tati Westbrook, who posted a similar video alleging misbehaviour and disagreements between the two stars.

The argument between KSI and Deji has provoked the interest of many of YouTube's biggest accounts, including PewDiePie. He posted a news video in which he said that KSI had been cancelled, noted that his following had dropped rapidly and that Deji's intervention was an attempt to reframe the dispute between the pair, which has been ongoing for months.

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"This whole video to me just seems ike a little brother not feeling recognised by his brother," said PewDiePie, who noted that the airing of private problems on YouTube appeared to be growing in popularity.

KSI suggested in new tweets that he would post another video in which he responds to the allegations by his brother – as well as possibly revealing more private details of the dispute between the two.

"Finally watched the Deji video," the first of KSI's tweets read. "Currently on tour but will reply very soon."

In a follow-up post, he then said was "Time to end this once and for all I guess".

And in his final post, he asked for stories about his brother, presumably in order to expose them to the public.