from the comments on that youtube channel I found this nice little story;
So, I grew up in West Hollywood and worked at Gelson's. I encountered Jimmy Stewart on a regular basis when I was a teenager working in Century City Gelson. and as a person of mixed heritage Black and Jewish, my experience with Mr. Stewart was quite different that what you have discribed here. The first time I met him he asked me if I could get him some sugar on the bottom shelf citing that his knees weren't what they used to be. When I told him "Of course, Mr. Stewart." He responded "You know who I am?" and I told him "everyone knows who are." He asked me my name and made a comment about the healthy head of locks that I had. And told me when he came back if he needed any help he would look for me. Which he did and he called me his "shopping buddy." Now, of all the blue eyes, blond haired other kids that worked there at the time, if he hated me and my kind so much then why pick me out of a group to be nice to. He regularly gave me $10 or $20 tips for taking his bags to his car, and at Xmas I got 100 bucks. I was the envy of everyone at Gelson's. So, I don't know what bee got in your bonnet to smear his name like that, but I actually met the man, and he never said a word out place to me.
This breaks a lot of this down. Stewart wasn't racist.
https://vanguardofhollywood.com/was-jimmy-stewart-racist/