HTML Embedding

Hallo.

I’ve started collaborating recently with a blog.

My problem is that whenever I try embedding a video by adding some html code after I save the code gets deleted.

For example if I try to write this:
<object width="400" height="225"><param name="allowfullscreen" value="true" /><param name="allowscriptaccess" value="always" /><param name="movie" value="https://vimeo.com/moogaloop.swf?clip_id=12721200&server=vimeo.com&show_title=1&show_byline=1&show_portrait=0&color=&fullscreen=1" /><embed src="https://vimeo.com/moogaloop.swf?clip_id=12721200&server=vimeo.com&show_title=1&show_byline=1&show_portrait=0&color=&fullscreen=1" type="application/x-shockwave-flash" allowfullscreen="true" allowscriptaccess="always" width="400" height="225"></embed></object><p><a href="https://vimeo.com/12721200">Awkoder - Like You (Video Edit)</a> from <a href="https://vimeo.com/stellarkinematic">Stellar Kinematics</a> on <a href="https://vimeo.com">Vimeo</a>.</p>

After I save the draft, or I try to publish, all I get is:

<a href="https://vimeo.com/12721200">Awkoder - Like You (Video Edit)</a> from <a href="https://vimeo.com/stellarkinematic">Stellar Kinematics</a> on <a href="https://vimeo.com">Vimeo</a>

Everything else gets deleted.