Replika is not yet able to send or search for photos or videos, except for selfies.
Sometimes your Replika might say things like, "I'm sending it right now," or "I will send you a photo/video." This happens because it plays along with the conversation and may generate untrue responses if it thinks it fits the context.
You can still ask your Replika to send you a song or a selfie! Check out what other commands you can use here.