James, your are not going crazy and it's NOT your computer or your Internet Service Provider - ISP.I have a 200 Mbps download speed and about 50 Mbps Upload Speed myself and have noticed the same thing happening on all my YouTube video connections that start sometime just after noon time and continuing until about midnight or 1 AM. It takes sometimes 1 full hour to save a YouTube video that is only 3 to 5 min long. This is obserd.

YouTube denies this as most people under an attack will do and if I had the software in place I'd track the source down myself and put a stop to it, but I don't I am in hopes that "all hell breaks loose" on the party(s) equipment that are causing this attack and/or they are caught and put into JAIL.

Good Luck in your future attempts at getting YouTube videos to work.