Announcing Baby Arrival

I got married in June and just got my wedding pictures back. I have not told my family that I'm pregnant yet. I was wanting to make a video of the wedding pictures and at the end have a short video of my husband and I at the Dr. appointment hearing the heart beat. I'm not getting my first ultrasound until 20 weeks and I'm currently 17. I have an appointment coming up August 7th. Which I will be 18 weeks. I am expecting to get to hear the heart beat again that day. So my question is has anyone recorded a video at an appointment? I will be asking the doctor that day but I want to know if anyone has done so or if you think I won't be able to so I plan something else!