The three biggest record labels are demanding more money for songs played on TikTok and its Chinese counterpart Douyin, setting up a showdown with the hugely popular video apps, people with knowledge of the matter said. Deals between the labels and the Chinese owner of the services, ByteDance Ltd., expire this spring, according to the people, who asked not to be identified because the discussions are private. The two sides have made little progress in negotiations that have been going on since last year, they said.