Question: Which channel in youtube has the most subscribers?

Disambiguated questions and answers:
context: No context provided
question: What was the Youtube channel with the most subscribers as of December 23, 2013?
short_answers: PewDiePie

context: No context provided
question: What was the Youtube channel with the most subscribers as of December 12, 2013?
short_answers: YouTube Spotlight

context: No context provided
question: What was the Youtube channel with the most subscribers as of December 28, 2013?
short_answers: PewDiePie

Long answers:
knowledge: content: The most-subscribed channel as of September 2021 is T-Series, an Indian music video publisher operated by the entertainment company of the same name. With a subscriber count of 193 million, the channel has held this distinction since April 14, 2019.
wikipage: List of most-subscribed YouTube channels

content: In mid-2018, the subscriber count of the Indian music video channel T-Series rapidly approached that of Swedish web comedian and Let's Player PewDiePie, who was the most-subscribed user on YouTube at the time.[79][80] As a result, fans of PewDiePie and T-Series, other YouTubers, and celebrities showed their support for both channels. During the competition, both channels gained a large number of subscribers at a rapid rate, and surpassed each other's subscriber count on multiple occasions in February, March, and April 2019.[56][57][58][60] In the end, T-Series won the race and became the first channel to cross the 100 million subscribers mark.
wikipage: List of most-subscribed YouTube channels

content: YouTube (formerly YouTube Spotlight) is YouTube's official YouTube channel for spotlighting videos and events on the platform. Events shown on the channel include YouTube Comedy Week and the YouTube Music Awards. Additionally, the channel uploads annual installments of YouTube Rewind. For a brief period in late 2013, the channel was ranked as the most-subscribed on the platform. As of April 2021, the channel has earned 31.4 million subscribers and 2.3 billion video views.[2]
wikipage: YouTube (channel)

content: The YouTube channel was registered in 2005. On November 2, 2013, the YouTube channel briefly surpassed PewDiePie's channel, to become the most-subscribed channel on the website. The channel ascended to the top position through auto-suggesting and pre-selecting itself as a subscription option upon new user registration for YouTube.[3] Throughout December 2013, the channel and PewDiePie struggled for the top position, but soon PewDiePie secured it on December 23, 2013.
wikipage: YouTube (channel)

content: Felix Arvid Ulf Kjellberg (/ˈʃɛlbɜːrɡ/ SHEL-burg, Swedish: [ˈfěːlɪks ˈǎrːvɪd ɵlf ˈɕɛ̂lːbærj] (About this soundlisten);[4] born 24 October 1989), better known online as PewDiePie (/ˈpjuːdiːpaɪ/ PEW-dee-py), is a Swedish YouTuber known primarily for his Let's Play videos and comedic formatted videos and shows.
wikipage: PewDiePie
long_answer: The most-subscribed channel as of September 2021, is T-Series, an Indian music video publisher operated by the entertainment company of the same name, that has a subscriber count of 193 million, and has held the most-subscribed spot since April 14, 2019. Before T-Series, the Swedish YouTuber PewDiePie, known for his Let's Play videos and comedic formatted videos and shows, held the spot for top subscribers until mid-2018, when T-Series rapidly approached his subscriber account. This encouraged a competition, which other YouTubers, and celebrities showed their support for, gaining both channels a large number of subscribers at a rapid rate, but in the end, T-Series won the race and became the first channel to cross the 100 million subscribers mark. On November 2, 2013, YouTube Spotlight, YouTube's official YouTube channel for spotlighting videos and events on the platform, briefly surpassed PewDiePie's channel in subscribers  through auto-suggesting and pre-selecting itself as a subscription option upon new user registration for YouTube, which led the two channels to struggle for the top position, but soon PewDiePie secured it on December 23-28, 2013.