Hello Greg, I would like to give my opinion on this matter now after having seen that video.
Richard, the driver of your car at the time, had a better chance of avoiding Eric's car than Eric did of avoiding this accident. Given that Richard has far far FAR more chance of seeing Eric's MX5 before the impact than Eric did of seeing that thing coming towards him, perhaps Richard could have bitten the bullet and straightened his steering to run behind the MX5 before he left the tarmac. There is no way at that speed he had any hope in his mind that he might make the corner. From the moment he entered it without brakes, he knew he carried too much momentum to turn.
Richard was the ONLY person who could have avoided that accident.