Watching Gibi's latest video I get the feeling he was a kid in high school who always wanted to be "in" with the popular kids, but never was because he was balding at 16, didn't play any sports, had no personality, wasn't academically exceptional, and there was nothing interesting about him.
He had no real successes in life. He wasn't going anywhere in school. He wasn't going anywhere in the business world. He had no prospects. So he latched onto Chris Chan because laughing at Chris made him feel better about himself. He dedicated his channel entirely to Chris so could be seen as an expert/authority on something to get respect from the popular kids on the internet.
If you think Chris' family is embarrassed about how he turned out, imagine how Gibi's parents feel that their child's career is dedicated to documenting Chris. The worst question you could ask his parents is "What does Devon do these days, Mr. and Mrs. Gibi?"