Well her job requires her to be fluent in some languages.

This CN lady probably is tasked to cover news based on MY/ Indo region to be reported backin CN market.

On the prerequisite of knowing a certain language to survive, that is totally wrong. Because Deaf and Mute would not have any place at all in the world if this was true.

In CN, they do not need to learn any other language because they have everything they need and want locally there. They just hire the Ah Moi in video to be the bridge between countries if needed.

If you are a youtuber with some proficiency at a few languages, then you make content based on that ability.

Language is just another skill.