I would recommend using the video file provides English accent, or cha American only applied to listening, because I think it would be useful to learn the skills to listen to my speech.
I'd recommend The meeting was the only British or American accent video files used in the hearing. Because I think it would be useful to learn to listen and speak my very seriously.
I want to introduce master use video files, the British or American. Use in listening test Because I think this will be helpful to learn the skills of listening and speaking my very much.