The BBC video you linked has already been disproven. We also know that the BBC is by no means "journalistic", it is the propaganda arm of the British state.

On "cultural genocide", here is an AP News article (mainstream) documenting their visit to Xinjiang as soon as it was open for tourism, with the conclusion reached that the repression ended before they arrived (2021)—the article of course still holds on to some of the Western pretenses, with numerous falsehoods still being spread with the attempt of holding onto the cultural genocide myth.

And here is Sibel Edmonds, a former interpreter with the FBI, talking about the U.S.’s plan for Xinjiang in 2015 (crackdown began in 2017): “Xinjiang is the entry artery of energy. We want to, gradually and internally, play the gender card and the race card. For that part of the world, we want to play the minority without land. We say we are going to help them and they are being oppressed, Chinese are gunning them down and torturing them.”

And you can consult this talk on the war in Afghanistan by Lawrence Wilkerson, Chief of Staff to former Secretary of State Colin Powell and retired US Army Colonel, where it is admitted that a strategic reason for continued U.S. presence in Afghanistan is for the use of the Uyghur population in that nation as a bulwark against China (see Paul Williams' Operation Gladio, p. 271 for further evidence of U.S. promotion of terrorism and unrest in Xinjiang).

The very premise of "cultural genocide" of Uyghurs is strange when China has roughly 54 other ethnic groups which have been relatively unscathed, including other Muslim-majority ethnic groups such as the Hui ethnic group, which is larger than the Uyghur population. What could be the reason for this?