jarama 1970 jean piere beltoise matra, guy in flames is jackie ickx in ferrari, guy following beltoise i guess is graham hill, but not quite sure.
and this is what my source says about the crash: At the start of the race Jack Oliver's BRM collided with Ickx's Ferrari and both cars caught fire but both drivers escaped with relatively minor injuries, Ickx suffering a few burns. The cars however were both destroyed and continued to burn for some time. BRM immediately called in Rodriguez to check the suspension as Oliver reported an axle failure. The car was withdrawn.