This first video may be very useful, it has English subtitles and the pronunciation is very clear.
On the second video, there are no subtitles and the speech is faster.
And the last one could be for younger children, still it would be necessary to prepare students to what they will listen to since this video does not contain any subtitles and the speech is standard fast.
I hope you find these videos useful. If you have more ideas, please share them with us.
