First you have to fill out an online form on their website and sending your CV. After that you have to pass an initial test about their guidelines then a transcription test with at least 95% accuracy.

You first take an easy multiple choice test regarding English (grammar, spelling, punctuation, etc.) and their style guidelines (which they provide). Then you get an email containing a test video to transcribe. The video itself is short, but contained low quality audio with extreme background noise and people talking over each other. It was fairly difficult, but doable.