Channel hopping yesterday evening, I came across a "How it's made" on Quest featuring the Walker Titan. As a one time 5" x 4" user, it was interesting to see how Walker make their bellows, and how it all fitted together. I don't know when this episode was made, but I guess it could have been 5-7 years ago.

 

Shame I missed that one, one of my favourite shows I hope they had some fitting puns such as 'seeing the light', 'got some exposure' or 'the parts click in to place'

 

I think it might have made its way to YouTube. Try Googling for "Walker Titan" and YouTube.

 

A good suggestion, caught it albeit with a US narrator rather than the UK chappie. Noticed a speed graphic at the beginning of the clip hopefully it's just the voice-over that changes and not the visuals