I just wanted to expand upon my previous reply. It seems like a lot of members are having this issue. I'm pretty sure that the reason you can't log on from home - but CAN log on from work - is because your home IP address is being blocked by YT. I'm not sure why exactly. It probably is a little bug from the server update. But this is what I did...
I ran a traceroute on my computer & sent it to admin via Facebook. A traceroute shows exactly where the connection from your computer to YT is failing. Here's how to run a traceroute:
How to Use the Traceroute Command
After you run it, copy & paste the entire traceroute to a text file & email it as an attachment to YT via FB. This will let admin know where the conflict is occuring. It will also allow admin to unblock your IP.
In the meantime, you can access YT through a proxy website. A proxy website will block your home IP address & connect to a website using an alternate IP address. Here's a list of multiple proxy websites:
How To Access Blocked Web Sites
Good luck! It took me an entire day to figure all of that out. It was a long day of trial & error and adjusting multiple settings on my computer. Hopefully, I'll be able to save someone else the frustration of having to go through all that. I hope that works for you!