Sure, go right ahead and use whatever you like!

I put my url on them knowing that they’d be downloaded and reposted, it’s a way to keep the source intact ;] tho if u notice I don’t add it on some that I think either push the envelope of offensiveness too far or I feel like I didn’t really add enough to claim them as “mine.”
But yes, it would be gr9 if you tag me when you use them, just add a little [i-want-my-iwtv] below them, bc then I’ll see it in my activity feed, and can see it in your post. It’s really fun to see these things in different contexts. A tag would be nice, too, as #iwantmyiwtv or #i-want-my-iwtv.
Obviously, it would be best if people who want to use my works use them as reaction gifs only, and not simply repost on a new post… but I can’t stop that from happening, so I can’t really get upset if it happens. It means too much to me to be able to share these things freely, so it’s a risk I’m willing to take. I’m sure it’s happened already *shrugs*