These are both interesting (historically) and only about 5-6 minutes to watch.  I hadn't even heard of In n Out until recently and I lived in Southern CA in the 1960's and 1970's.  Go figure.  I remember International House of Pancakes, Tastee Drive-In (I walked past in on my way home from school, so I often stopped for a shake or something), the weinerschnitzel place (Der Weinerschnitzel - something like that), DeMac Pizza Burger Shops, A & W, Jack in the Box, etc.  There were no fast food taco places, you had to go to an indoor-seating restaurant to get Mexican food and it was delicious. Nothing like today's crappy fast food tex mex crap.  My favorite place in Montrose was El Charro's.  Makes my mouth water just to think about their enchilada plate.  It was SOOOO good.


McDonald's:

https://www.youtube.com/watch?v=ESFJOylxAi8&feature=emb_rel_end 

In 'n Out:

https://www.youtube.com/watch?v=9rNfJClN4js