Need help with an error in dreamweaver

Try reversing the double & single quotes.   Expressed this way, no errors are reported.

<section class="video-section overlay" data-vide-bg= "{'mp4': 'video/video-calltoaction.mp4', 'poster': 'video/placeholder.jpg'}" data-vide-options="posterType: jpg, loop: true, muted: true">

</section>

You'll need to test it in production.  Failing that, revert to what @Jon Fritz said.

Hope that helps.

Sounds like the Linter telling you something that isn't true... again.

DW's Linting program (the error checker) is less than stellar and often gives "errors" where there are none. Use the real validator at http://validator.w3.org/nu if it says you're good, you can ignore DW's chirping.

If you would like not to be told your clean and valid code is wrong, got to Edit > Preferences > Linting and uncheck the box for Enable Linting.

If you don't mind being told your code is wrong, when it is, and you just want the double quote "error" to go away, you can go to Edit > Preferences > Linting > highlight HTML > click Edit & Apply > scroll to "attr-value-double-quotes": true, and change it to "attr-value-double-quotes": false, > Save and close.