Ok here are my instructions
Sign up to join the race as a competitor as per normal.
I assume you are using a PC?
Before the race starts press 'windows' key and 'G' together. This will launch the record features in Windows. Then press Record to start.
To watch other riders click on their name on the right side list.
You as a Racer will just sit on the start line. You can jump from rider to rider to watch who you like. Don't press return to me else all you will record is yourself sat on the start line.
Soon as the race starts click on a rider high up the table, then just look out for Cyclechat riders to click on their names
Easy