Detected an anomaly in YouTube search for Laravel

Hi all, I was going through Google Trends for laravel and I found something interesting but I can't seem to know why there's a serious dip in YouTube Search for laravel. Take a look at the image below. This dip occurred an year ago between 6 August - 12 August 2017. Does anyone know why this happened. The only explanation I have is that, YouTube might have changed their search algorithm but could it result in 75% less search.

Link to the image: https://ibb.co/cvLGAe

Link to the Google Trend: https://trends.google.com/trends/explore?date=today%205-y&gprop=youtube&q=laravel,%2Fm%2F0jwy148