Is there a way to add a gif to a Markdown file?

From the Markdown Cheatsheet:

You can add it to your repo and reference it with an image tag:

Inline-style: 
![alt text](https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png "Logo Title Text 1")

Reference-style: 
![alt text][logo]

[logo]: https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png "Logo Title Text 2"

Inline-style:

Reference-style:

---

Alternatively you can use the url directly:

![](http://www.reactiongifs.us/wp-content/uploads/2013/10/nuh_uh_conan_obrien.gif)

Showing gifs need two things

1- Use this syntax as in these examples

![Alt Text](https://media.giphy.com/media/vFKqnCdLPNOKc/giphy.gif)

Yields:

2- The image url must end with gif

3- For posterity: if the .gif link above ever goes bad, you will not see the image and instead see the alt-text and URL, like this:

4- for resizing the gif you can use this syntax as in this Github tutorial link

<img src="https://media.giphy.com/media/vFKqnCdLPNOKc/giphy.gif" width="40" height="40" />

Yields: