Here is a clip of 'Salesman' (1968) by the Maysles brothers, one of their very successful films. Due to the lack of material in the University's library, I have had to use Youtube as my main source for material and so I have not been able to view the full version. However, this clip does point out the kind of techniques we may use such as handheld, moving shots. From what I have seen in other clips also, it looks like a good watch.