Ian Anthony Kochinski (born February 14, 1994), better known as Vaush (/vɔːʃ/ ^ⓘ VAWSH), is an American left-wing YouTuber and former Twitch streamer. Kochinski started his online career as a member of streamer Destiny's community, before creating his Twitch channel and YouTube account in 2019. His content consists of commentary on various news and media topics, men's fashion, video games, and urbanist policies. Debates and discussions with various political figures have been a large part of his channel. Noted for his confrontational style, use of memes, and mimicry from right-wing YouTubers, he is regarded as part of the BreadTube community.

Described as a progressive and libertarian socialist, Kochinski is considered a controversial figure online. He has received several bans on Twitch and criticism for various statements, and has also received praise for his sociological content, debates, and charity livestreams.

Ian Anthony Kochinski was born on February 14, 1994, in Los Angeles, California, and grew up in Beverly Hills. Kochinski studied sociology at Humboldt State University, graduating with a BA in 2018. Kochinski identifies as pansexual. He is autistic and also has ADHD.

Kochinski has livestreamed debates with far-right figures such as Stefan Molyneux and Sargon of Akkad, which have millions of views. His first appearances online were in discussions with the political streamer Destiny, and encouraged by Destiny's audience he later began a Twitch channel of his own. He also created his YouTube account in January 2019. Kochinski felt that other members of the online left at the time were too academic to reach the demographic of insecure white men that he thought was most susceptible to online radicalization and he opted to instead create loud, angry content that he thought would be more likely to appeal to them. While appealing to what he calls "masculine tendencies", Kochinski has aimed to create an inclusive community and has comparatively high proportions of female, gay and trans people in his audience.

Kochinski mimics the style of right-wing YouTubers and utilizes similar video titles so that his videos are suggested by recommendation algorithms to those at risk of radicalization, a common strategy employed by the left-wing BreadTube community on YouTube. He also uses memes and internet slang in his videos to appeal to the audience of primarily young people online. Listed as an example of a BreadTube channel, his content features himself discussing news events and contentious issues, and debating other political streamers from the left and right, often in a confrontational style aimed at making his opponent appear unintelligent, and often utilizing the research skills and knowledge he gained from his sociology education to back up his arguments. However, when engaging with conspiracy theorists, Kochinski generally does not spend much time on research or debunking debated topics, as he believes that taking a more amiable approach is better at influencing people away from such hardened views. His channel also features discussions and debates with offline figures, including journalists, radio hosts, and political candidates. By 2021, he amassed over 350,000 subscribers and 120 million views on his YouTube channel.

In 2019, he was banned from Twitch for saying that the US should invade Israel in defense of Palestinians, an incident which he later described as himself "going too far criticising Israeli imperialism". As a result, he transitioned to YouTube as his main platform, after having created his YouTube channel that January. In June 2019, Kochinski debated conservative YouTuber Hunter Avallone. Avallone later said he "got wrecked in [that] debate" and subsequent to the debate his views took a leftward turn, resulting in a video titled "Why I Left The Right". In December 2021, Kochinski was again banned from Twitch indefinitely for using the racial epithet "cracker" on stream. He used the term while discussing whether it could be considered a racial slur and if saying it should be a bannable offense following the ban of fellow Twitch streamer Hasan Piker for saying the word on stream. In response to the ban, Kochinski told The Washington Post that social media platforms are "terrible at acknowledging context and power relations when it comes to harassment."

Kochinski and fellow political streamer Destiny organized their communities to knock on more than 10,000 doors and make 50,000 phone calls in support of Janet Protasiewicz during the 2023 Wisconsin Supreme Court election. In a Progressive Victory livestream that September, Kochinski, along with Destiny, Emma Vigeland, and Keffals, interviewed U.S. Representative Ro Khanna about various topics, including the importance of youth political participation and ways to push progressive political sentiment.

Noted as a left-wing streamer, Kochinski is a self-described progressive, anti-fascist, and libertarian socialist. He has also described himself as a "dirtbag leftist". In the 2020 United States presidential election, he opposed the "Bernie or Bust" movement and urged people to vote for Joe Biden, calling a refusal to vote "stupid" and motivated by "[an] incredibly narcissistic 'doomerism' that prevents people from engaging in meaningful action". Kochinski opposes the United States embargo against Cuba and supported the withdrawal of United States troops from Afghanistan. He also opposed Donald Trump's withdrawal of United States troops from Rojava. While believing that tech companies have too much power, Kochinski also felt that Donald Trump being banned from various social media websites was an "unequivocally good thing". In 2022, Kochinski posted multiple videos and broadcast multiple livestreams condemning the Russian invasion of Ukraine.