A federal US judge has postponed President Donald Trump's threatened shutdown of the popular short-form video app TikTok. The judge ruled in favour of a Pennsylvania comedian and two other TikTok creators who appealed that Trump's order hampers their free speech. The judge on Friday blocked an upcoming Commerce Department action that would have effectively banned TikTok in the US by cutting it off from vital technical services. The Trump administration has said TikTok is a security threat, citing its Chinese owner, ByteDance, and the possibility that the Chinese government could spy on users. Trump's executive order was set to take effect November 12, but is now on hold as the lawsuit proceeds.