Disney+ might seems successful but all thanks to Mayer who led the company into success when it was released back in November Although Mayer’s appointment in the Disney streaming platform is now being moved on to ByteDance, the Chinese company expects him to assume the role by June 1.

ByteDance owns TikTok, a short video sharing platform much like Vine. The platform has become really popular around the world witht people doing viral challenges and so on. TikTok which was formerly Musical.ly has hinted at ambitions to build a music streaming business, announcing in January that it was partnering with U.K.-based music rights agency Merlin to expand its musical selections.

ByteDance’s Chinese ownership, however, has sparked concerns in Washington about TikTok’s handling of personal data. The company uses sophisticated artificial intelligence to make video recommendations based on users’ behavior on the app. Back in November, the US government did a national security review of ByteDance’s US$1 Billion acquisition of the Musical.ly application which would go on to become TikTok and two US senators introduced a bill to ban federal employees from using the platform on government – issued phones.

One of those senators, Republican Josh Hawley, said TikTok previously told him its executives could not testify before Congress because they were located in China. “But this new executive lives in the USA,” Hawley wrote on Twitter on Monday. “I look forward to hearing from him. Under oath.”

In order to increase its userbase and appease the US government, TikTok had made numerous efforts to separate much of its Chinese businesses and has made some high profile executive hires in recent times which includes the hiring of the former Microsoft intellectual property chief Enrich Andersen as its Global general counsel in January as well as hiring of Vanessa Pappas who had worked as at executive position in YouTube in order to run the US operations of the platform last year.

Speculation over Mayer’s future began swirling in February after Disney named Robert Chapek as chief executive officer. Mayer, who has a “loud and forceful” style, according to a former Disney executive, was seen as a dealmaker who had only recently been put in charge of a large profit-and-loss division. His relative lack of operating experience was a main reason he did not get the top job, the former executive said.

A ByteDance spokesman said the company had “no reservations” about Mayer’s operational experience. “Any company in our sector would be delighted have him onboard.” While Mayer was leading Disney+, the platform was able to acquire some 50 million subscribers under five months. Disney named Rebecca Campbell, a 23-year company veteran, to replace Mayer as head of the direct-to-consumer and international division, which includes the streaming media units Disney is counting on to drive future growth