click here !!!

it depends on what あなた mean... if u want to make a gif image it quite easy and あなた can do it in many sites... but if u want to cut parts from a video and then maybe put it along with others あなた can use programmes like Windows Movie Maker which is in every computer that has windows... if u have an 林檎, アップル computer または one of any other kind there are also programmes like Power Director, iMovie and others which u can use...

They're called gif's.

Here is a link to a site where あなた can make them: link

There called GIF's.