The reason you are failing User Story #5, is because the nav-link class should be place on the clickable element (the anchor element).
The reason you are failing User Story #6, is because you are not using the video element properly. See below for proper syntax:
<video width="320" height="240" controls>
<source src="movie.mp4" type="video/mp4">
Your browser does not support the video tag.
Overall your html is a mess. Below I detail out several problems/issues you need to resolve.
#1) You are not properly closing out nested elements before opening others.
For example, the following is not correct syntax:
<strong id="strong-price">$500<span=2em><p id="beta"></span></strong><button>Yes!</button></p>
You have an opening strong tag, followed by an opening span tag, then an opening paragraph tag. So far everything is ok, but then you close off the span tag before closing off the paragraph tag. Also, I assume you think span=2em is going to make the text size of the text inside the span tag 2em? Nope, it will do nothing. You should create a CSS class and assign the value 2em to the font-size property of it and then attach the class to the span element via the class attribute.
The following would be valid:
<strong id="strong-price">$500<span class="font2em"><p id="beta"></p></span></strong><button>Yes!</button>
Of course you have no text specified for the above paragraph element AND paragraph elements should never be inside span elements anyway, so it should not even be included in the html.
#2) Another problem is the following line:
<input type="submit" id="submit" a href="https://www.freecodecamp.com/email-submit" required></a>
input elements do not have a or href attributes. What were you trying to accomplish here? Where you trying to have the form to submit the information in it to
https://www.freecodecamp.com/email-submit? If so, then you should assign the url to the form’s action attribute.
#3) The following ids appear for than once in the document. Ids are supposed to be unique and never should appear more than once in a single page.
The id ‘strong’ appears more than once in the document.
The id ‘strong-price’ appears more than once in the document.