Since Weebly’s Carbon update, you may find the youtube video background in Footage or Screenplay not working properly. This is an update for this bug fix:
step1: Login to your Weebly account
step2: Click into “design” then into “edit html/css”
step3: On the left hand column locate and click into Footage (index.htmlfor MIX-N-MATCH themes or plugin-footage.html for all-in-one) or Screenplay (splash.html for MIX-N-MATCH themes or splash-screenplay.html for all-in-one)
step4: At the TOP of the page, locate the code highlighted below:
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en-US">
step5: REPLACE the highlighted code with this:
step6: Save your change and re-publish your site.