How to embed video on my first website - css

Question

I am creating a grid like layout of articles and videos for my home page. I want all boxes to be the same dimensions including the video ones, but i have some questions about adding youtube videos to my site.
question 0: I herd HTML 5 supports video but I am considering embedding YouTube videos as most of my videos are from YouTube and I herd that HTML5 video isnt supported well enough? Should I consider HTML5 video?
question 1: Considering YouTube videos, how do I add YouTube videos into my HTML and CSS?
question 2: How can I make sure that the video fits inside my markup and not any smaller or bigger.
question 3: How can I also make sure that the user can have access to the same video controls thar YouTube provides, eg fullscreen, play, ect.....
I will also take any advice on my HTML and CSS.
Heres the HTML for the grid like articles and videos for my site:
<div class="modules-container">
<h3 id="on-god">On God</h3>
<div class="row clear-fix">
<section class="article-module">
<header>
<h4>
Article Name
</h4>
</header>
<blockquote cite="articles/name">
<p>
<em>My example quote will go here</em>
</p>
</blockquote>
<footer class="article-module-footer">
Read More
</footer>
</section><!-- end .article-module -->
<section class="article-module middle">
<header>
<h4>
Article Name
</h4>
</header>
<blockquote cite="articles/name">
<p>
<em>My example quote will go here</em>
</p>
</blockquote>
<footer class="article-module-footer">
Read More
</footer>
</section><!-- end .article-module -->
<section class="article-module">
<header>
<h4>
Article Name
</h4>
</header>
<blockquote cite="articles/name">
<p>
<em>My example quote will go here</em>
</p>
</blockquote>
<footer class="article-module-footer">
Read More
</footer>
</section><!-- end .article-module -->
</div><!-- end .row -->
<hr>
<h3 id="videos">Videos</h3>
<div class="row clear-fix">
<section class="video-module">
<h4>
Name of video
</h4>
<p>
My embeded video will go here
</p>
</section><!-- end .video-module -->
<section class="video-module">
<h4>
Name of video
</h4>
<p>
My embeded video will go here
</p>
</section><!-- end .video-module -->
<section class="video-module">
<h4>
Name of video
</h4>
<p>
My embeded video will go here
</p>
</section><!-- end .video-module -->
</div><!-- end .moduels-container -->
</div>
And my CSS thus far. I should note Im using normalize.css in another file.
/*
Author: David Espejo
*/
/* rem is base off of root font size */
/*
Padding and borders are
included in the width
of all elements
*/
*, *:before, *:after {
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
}
/* Small screens (default) */
html { font-size: 100%; } /* root font size 16px */
/* Medium screens (640px) */
#media (min-width: 40rem) {
html { font-size: 112%; } /* root font size 17.92px */
}
/* Large screens (1024px) */
#media (min-width: 64rem) {
html { font-size: 120%; } /* root font size 19.2px */
.article-module, .video-module {
float: left;
width: 30%;
padding: 0.3rem 0.5rem;
}
.article-module.middle, .video-module.middle { margin: 0 5%; }
}
.container {
margin: 0 auto;
max-width: 48rem; /* not > (48 * 19.2 = 921.6px)! */
width: 90%; /* when < 921.6px */
}
.row { border: 1px solid blue; }
.article-module, .video-module { border: 1px solid red; }
.clear-fix:after {
content: " ";
display: block;
clear: left;
}

Answer 1

Answer 0: I would suggest to go with embedded videos since you are mostly using youtube videos. That way you wont have to worry about the controls for the video.
Answer 1: You can take the embed code provided by the youtube and drop it anywhere you want to in your HTML.
<iframe width="560" height="315" src="//www.youtube.com/embed/PKa6XdWat2s" frameborder="0" allowfullscreen></iframe>
In your case this iframe tag would go wherever you have mentioned "My embeded video will go here"
I would also suggest using a div tag instead of p to contain the videos. As far as I know p tag is used for paragraphs of text.
Answer 2: You can make sure the video fits inside your grid by controlling the width and height of the iframe tag from the stylesheet.
Something like this.
.iframe {
width:100%;
height:100%;
}
By doing this the video size will be the size of the containing div.
Answer 3: As I mentioned above the controls should already be there for you.
fiddle link : http://jsfiddle.net/6vh2t/1/

Answer 2

Your HTML looks pretty good. I'd maybe use <article> rather than <section>, that seems to be more appropriate.
You can get the embed code for any video by clicking share then embed. Youtube used to use <object> but now it seems to be <iframe>, e.g.
<iframe width="560" height="315" src="//www.youtube.com/embed/9bZkp7q19f0" frameborder="0" allowfullscreen></iframe>
You can set the width and height (in pixels). Check the documentation to see about controls.
https://developers.google.com/youtube/player_parameters
Good luck. Cheers!

Answer 3

For youtube videos you can insert them as an iframe, like this:
<iframe width="420" height="315" src="//www.youtube.com/embed/fvdmISdytXg" frameborder="0" allowfullscreen></iframe>
Where src is the source of the video, also you can customize the width and height.