How to prevent YouTube js calls from slowing down page load
问题 I am using https://gtmetrix.com to diagnose issues with my page speed. The page in question has one embedded YouTube video and GTMetrix is saying that this video's JS calls are slowing down page load speed. This is the call being made: <iframe width="640" height="360" src="https://www.youtube.com/embed/PgcokT0AWHo" frameborder="0" allowfullscreen></iframe> 回答1: EDIT: as of October 2019, this is not working anymore (Thanks to @CpnCrunch for the update). For the cases where it's not impacting