<body style="padding:0px; margin:0px">
Non-breaking space: in there.... . It's &-n-b-s-p-; w/o the dashes.
Less than: <
&-l-t-; w/o the dashes
Greater than: >
&-g-t-; w/o the dashes
<!DOCTYPE html>
<big>, <center>, <font>, frame tags
<video width="320" height="240" controls="controls">
<source src="movie.mp4" type="video/mp4" />
<source src="movie.ogg" type="video/ogg" />
Your browser does not support the video tag.
</video>
controls = built-in movie controls