MrBeast, the world's most prominent YouTuber, reacted To online criticism after a video — in which he paid for 1,000 people to receive eye surgery — sparked criticism among some viewers. 

The YouTuber, Jimmy Donaldson, uploaded the video on January 28, and it received 59 million views in only three days. 

"In this video, we're curing 1,000 people's blindness," Donaldson could be heard saying at the beginning of the video as he was encircled by a large crowd. 

Donaldson helped 1000 people get sight-restoring cataract surgery and filmed the patients’ reactions afterward. The YouTuber interviewed Jeff Levenson, an ophthalmologist, and surgeon he worked with, who said: "Half of all the blindness in the world is people who need a 10-minute surgery."

A subsequent Instagram post from a nonprofit organization SEE International — who Donaldson collaborated with on the project — stated that the organization performed 1,000 surgeries across the globe over a three-week period for the video. According to the nonprofit MyVision.org, cataract surgery costs an average of $3,500 per eye.

Donaldson also gave away various prizes to participants in the video, including briefcases which he said contained $10,000 each, a Tesla, and a $50,000 cheque for one recipient to put towards a college fund. 

The video initially received an overwhelmingly positive and emotional response. On January 30, Donaldson tweeted that he "did not expect" the upload to receive such a large number of views in a short time, receiving messages of support that praised him for his generosity. 

"I don't think you can watch that video without crying. Hope it inspires more projects like this," wrote one commenter.

However, some viewers weren’t positive about the video. For instance, Twitch streamer Hasan Piker reacted to Donaldson's video in a January 29 live stream, saying that watching it filled him with "rage." 

"It is so extremely frustrating that it is up to one YouTube guy to decide to make content out of it when people who are too poor can't just fu**ing see," he added. 

In response, Mr. Beast replied, "Twitter - Rich people should help others with their money. Me - Okay, I'll use my money to help people and I promise to give away all my money before I die. Every single penny. Twitter - MrBeast bad," the tweet read.