this should be relevant now

@sugarfreetargets  
If you want plain, ordinary screencaps, I suggest purchasing SnagIt. Not sure if it captures gifs, but at least it snags something.

@redweasel  
It’s a SIGHT GAG. There’s nothing forced about it.
 
But if you wish to continue being wrong, then by all means, have a blast.

it would have been brilliantly perfect timing if they had her soapboxing for a reason other than forcing the joke.

@Gizoid101  
Glad to be of service.  

After all this time, it’s only after reading the previous comments that I understand (or even acknowledge) this gag.

Soapbox.

@Background Pony #7EF6
 
Exactly what TheAntiCat said. Photoshop will give you the best gif quality for sure, but there is a learning curve. There’s also some programs that allow you to screen capture gifs, like gifcam or ScreentoGif. (Please be careful downloading them, most screen capture software is full of malware.)
 
There’s also websites like gifyoutube that allows you to make quick gifs using youtube URL’s. You can also use websites like ezgif or online-image-editor to edit your gifs. (Like cropping, re-sizing, add text)

@Background Pony #7EF6  
You can use Photoshop or a service like http://imgur.com/vidgif to extract up to 15 seconds from a Youtube video. Photoshop is best for quality.

@TheAntiCat  
Dammit, meant to include “‘standing on a soapbox’ is an American idiom…”.

how do you make gifs?

@mrdoctorderpy  
It’s an American idiom, used to describe someone going on a rant, usually of a political nature. It comes from a person standing on a street corner, on top of a box, so they are more clearly seen and heard by passersby.
 
The wiki article will explain in more detail.

This was THE scene in the show where I decided I liked it over four years ago now.

@mrdoctorderpy  
Twi’s getting on a literal soapbox (where she’s figuratively soapboxing).

@TheAntiCat  
could you explain the joke to me please

Still one of the best sight gags in the whole show.

This. This this this. This was just brilliantly perfect timing.