Unless you have the exact video file version the audio was ripped from, the audio will not match the video. Streaming services like Netflix have different frame rates (23.976fps vs 24fps) and varying intros. If you download a random audio track from the internet, you may find the dialogue playing five seconds before the character's lips move.
Because The Platform is a Netflix original, finding a standalone English audio track is notoriously difficult on public torrent sites (Pirate Bay, 1337x, RARBG clones). Here is what you will actually find: The Platform English Audio Track Download