If you’re trying to figure out why your Wistia, Youtube, Vimeo embed code doesn’t work on your site… You might have pasted the code from a word processor into your WordPress page.
Some word processors automatically style quotation marks like these ” (also the symbol for inches) to English typographic quotation marks like these ”.
Just replace all of the quotes with ” normal quotes.
Here’s a visual:
Here’s a simple online find/replace tool that won’t have any automatic styling that some word processors do: