**Videos:**

This (rather elementary) British video talks about constructing line graphs (time: 5:23)

This (also rather elementary) video talks about reading bar graphs (time: 3:19)

Frequency diagrams and cumulative frequency diagrams are discussed in this British video clip. (time: 4:17)

Circle graphs (time: 5:03) and (time 5:52) This first one is a bit too elementary, but it leads to the second one.