video block not working

The video block is not working properly when trying to link a YouTube video. Can not even use the Contact Us button because it wants me to Log In...I'm already logged in.

I am having a similar problem.  My YouTube URL isn't been accepted, that is, I enter it and nothing happens.  Older videos are where they should be and "play."  However, URLs are not accepted in new video blocks on any of our website pages.  Can we keep each other posted on any fixes, please?

I have messaged Squarespace about this but apparently their online help is closed Fri-Sat-Sun.  Maybe we can help each other out???

Thanks very much.

- Paul