This?
tenor.com/bGgVA.gif
Discussion
Getting closer 
I know it should be -https://tenor. com/bxD4g.gif— but it just shows blank for some reason
https:// media.tenor.com/yJwgcRYZRvIAAAAC/gotcha-haha.gif
Long press and copy. For some reason if the “media” is missing in the link it won’t populate correctly in the note.
My brain feels like
https://tenor.com/view/the-simpsons-homer-simpsons-gif-14052143
No that’s not the right link. You don’t need to do anything to it besides copy and paste, you just need to get it the right way
Here’s what i do on iphone to get the link (the menu item i chose was Copy) https://nostr.build/av/65a9386aa3f3b1ee9dae1022bfac00265dcfa420677175ab6616befda79e97b5.mov