I have chosen these two programmes for two reasons. In the first place, the items are more or less the right length. Nobody should ask their pupils to keep fully concentrated for 30 minutes. In the second place, the programmes I have chosen combine visual and oral material. Longer news items are more difficult to deal with than shorter ones.
Visual material can help weaker students to interpret and understand the spoken word.
Seven minutes is not too long for the pupils attention span, although teachers should realize that pupils will have to do several things at the same time, which will make it a difficult and taxing exercise. The object of the exercise is not only to improve your pupils listening abilities, but also to show them how news is presented and that they should learn to question its objectivity. If so, indicate what kind of material. Suppose you had to write an article about this event. The combination of listening and writing will be especially difficult at first, although in my experience pupils quickly learn to do this.