When someone sends you a funny video and says, "I'm laughing so hard," it's a positive and engaging message. Here are some suitable responses you can consider:
"Haha, I'm looking forward to laughing too! Let me check it out."
"That's awesome! Can't wait to see what's making you laugh so hard."
"I could use a good laugh too! Thanks for sharing; I'll watch it now."
"Thanks for sending it my way! I love a good laugh. ?"
"Your laughter is contagious! I'm hitting play now."
"I always appreciate a good funny video! Show me the hilarity."
"I bet it's going to be great if it made you laugh that much!"
Remember, your response should match the tone of the message you received and show that you're enthusiastic about watching the video and sharing in the laughter. Enjoy the video and have a good time!