Local news video of March 1968 Champ Car race

Here's a short local-news video previewing the California 200 race in March 1968. 

The video featuring longtime Fresno newscaster Gus Zernial is short on any real information, but there are two highlights for me:

1) The sound of the No. 15 Gerhardt Offy as Mel Kenyon pulls onto the track. 

2) A quick shot of a full grandstand. Throughout my reporting on Marchbanks' history, good shots of the stands have been hard to come by. 

I don't know whether the video was part of a local newscast (Zernial worked for Channel 30 in Fresno for years) or whether it was part of a network telecast. Can anyone share some insight into that question or anything else about TV coverage from the track in those days?