It seems that Vimeo doesn't work with https. We have a WordPress multisite on an hhtps where one of the sites has iframed Vimeo videos. There are links from other sites to the site with the videos. So, if someone links back to the site with Vimeo, the videos don't work.
I believe I need a redirect that will switch https to http on all addresses in that domain specifically, but not to the other domain/addresses. All the .htaccess code I have seen is for specific files, not for a specific domain. Or, is there another way to work around the Vimeo problem?
put this before # BEGIN WordPress in htaccess as seen here
and after modifying it a bit, you should get what you want.
RewriteCond %{HTTPS} on
RewriteCond %{HTTP_HOST} ^domain-with-vimeo\.com
RewriteRule (.*) http://domain-with-vimeo.com/$1 [R=301,L]
# BEGIN WordPress
<IfModule mod_rewrite.c>
#wordpress multisite rules here
</IfModule>
# END WordPress