Chrome shows Youtube as insecure
Your connection to www.youtube.com is encrypted with 128-bit encryption. However, this page includes other resources which are not secure. These resources can be viewed by others while in transit, and can be modified by an attacker to change the look of the page.
The connection uses TLS 1.2.
The connection is encrypted and authenticated using AES_128_GCM and uses ECDHE_ECDSA as the key exchange.
Google's own site is insecure?