the easiest way is : go to the link on gfycat (using your own link as an example : ) now pause the playback so you dont gvet taken to the next "relevant" gif automatically right click the gif and go to inspect or inspect element depending on your browser expand this frame : Spoiler: screenshot under it you see a bunch of sources, you always want the video/webm one so copy that link and remove the https:// like this : giant.gfycat.com/AgreeableVictoriousCondor.webm then simply paste that into the bar when you open the spray UI in game and bam!
