The ones he recorded during the winter were his most well-known, though also being controversial in nature due to their perceived danger—drinking alcohol before swimming near-naked in below-freezing temperatures—but some also characterised them as artistic for their presentation and content.

He suspected two men piloting a large motorboat of the theft,[a] noting that their boat had run full throttle into the port when he was gone.

[27] His first breakthrough video, uploaded in 2011, was "On Thin Sea Ice 2",[d] acquiring over one million views in the span of a week.

Despite claims that he had not done extreme sport or winter swimming before the video,[30] he had filmed himself practicing falling through frozen waters safely before.

Though Eckhoff commented on the illegality of publishing it without his permission, he did not mind due to the brevity of the clips, and said that he considered his inclusion "an honour".

[33] "On Thin Sea Ice 2" was featured at the 37th annual Banff Mountain Film Festival in 2013 under the tagline "Slide away with simple pleasures: skating, bathing, and a little vodka!

"[e][40][41] The follow-up, "On Thin Sea Ice 3", featured him supposedly swimming to a ferry to buy alcohol in the middle of winter.

[‡ 8] Part of the annual "First Snow" videos started in 2014,[44] it featured him submerging himself in a frozen bathtub while drinking vodka.

[46] His vodka of choice, Vikingfjord, made frequent appearances on his channel,[47][48] though he claimed that he had no connection to the brand, and that he had never been in touch with the company that produces it.

[h][‡ 3] He collaborated with Jonas Lihaug Fredriksen [no] of the Norwegian state-sponsored entertainment YouTube channel NRK 4ETG [no] in late 2019, when they went swimming together in winter conditions.

[50] NRK journalist Sigurd Øygarden Flæten attributed part of his success to his interactions with fans; Eckhoff made over 30,000 comments in reply to them.

[26] Eckhoff's videos were popular internationally, with the largest sections of his viewership being from European countries like Poland[i] and Russia, but also in the United States;[33] in 2016, Eckhoff recounted the story of how two Polish fans arrived at his home in the rural village of Kodal, where they bathed in a bathtub featured on his channel after enquiring about it.

[54] Clips of his videos have appeared on major television channels in Norway and internationally, including on the Norwegian news channel TV 2, on the American network G4, and on the American news network CBS, all in 2011,[3] in addition to an appearance on the Australian breakfast show programme Sunrise in 2016.

[56] Eckhoff has remarked on the ability of his content to affect the global perception of Norway: "[H]ere the tourism industry is, working to bring tourists here, and then I arrive tearing the whole thing down.

"[k][3] Others have corroborated these thoughts, like Kåre Gåsholt of Sandefjords Blad, referring to him as the likely biggest private disseminator of nature in Norway.

[53] Writing on his silent, yet humorous demeanor, Rafał Krause of Newonce [pl] compared him to Mr. Bean, adding further that his dynamic editing, with frequent changes of perspective, was akin to avant-garde cinema.

He explained that he had only drunk a few sips, adding that the decreasing alcohol level was due to him filming on separate days with different bottles.

[61] This was in light of a near-fatal ice-skating accident he experienced in 2007, when he fell through the ice at lake Goksjø at night, after which he became determined to practice "going into the water, and getting back out again".

[66] On 26 November 2021, Eckhoff fell through the ice at Jakobs dam, a lake west of Kongsberg, while recording a video for his YouTube channel.

After a witness reported hearing him calling for help, he was rescued by divers who performed CPR,[67] before he was flown to Ullevål University Hospital by air ambulance.

[68] The police reported that a hole had been cut into the ice of the lake, that he was alone at the scene of the accident, and that foul play was not suspected.

[50] Similar sentiments of grief were expressed in the comments of his other videos for several days after his death, in addition to various other social media platforms, including Facebook, Reddit, and the Polish Wykop, where internet users conveyed how their holidays would be sad in his absence.

[73] Eckhoff's life was depicted over three episodes of the podcast series Historier fra virkeligheten ("Stories from Reality") published by NRK in October 2023.