I have to say there is perhaps mileage in filming the raw material of the fights with broadcast quality cameras as every fight is unique and having good quality coverage of the fights has to be an asset that could be sold in the future.

I am sure the broadcast quality cameras are expensive but not as expensive to buy or hire as they were 12 years ago. Lighting would have to be increased but i am sure the lighting people would be able to adjust this. (speaking as an old man I could do with a bit more light in the arena anyway!!)

I am not saying the video footage has much commercial value at the moment, what I am saying is it could have in the future.
If Robot Wars goes back on TV the raw footage could be sold to the public as robot wars the early years, or even made into specials to be shown on any media. these can be edited into different formats, documentaries following the robot movement, or particular types of robots, or teams, or how things happened through the year or years or at particular venues, the list goes on!

The bottom line is the shows happen anyway so why not record them as best as you can?