All clips are filmed at angles and distances that relay the most accurate visual information. Alternative viewing angles are provided where necessary, with demonstrators performing in different orientations..

The clips are only available in high quality .AVI format. We no longer offer clips in Real Media format (.RM) since we have not been able to guarantee reliable synchronisation between video and audio.

AVI files are large and should be downloaded by Right clicking on the link, selecting "Save Target As...", and following the prompts.

We recommend that you view them using the Windows Media Player instead of a RealOne Player because the former has better buffering capability. The videos can be set to play continuously (by right–clicking the picture as it plays, selecting «Options», «Playback», «Repeat Forever»).

Pausing the clip and dragging the playhead slider allows you to view the demonstration frame-by-frame, a strength of the electronic format that you don't have in real life.