A video recorded on my iPhone doesn't appear in the expoprted Rush video :(

Hi,

I'm creating a range of tutorial videos at the moment and have done the following:

1. Screen recorded my computer screen (this is on layer 1 in Rush)

2. Filmed and recorded me speaking through my iPhone (this is layer 2 in Rush)

The iPhone recorded video is just a little overlay in the corner on the entire video; however, when I export the entire Rush video, the iphone video doesn't appear! Only the audio from this clip is played.

I've tried exporting off my Macbook and also PC, but the issue remains. I have a pro version of Rush and have tried every export setting available.

I desperately need help and have spent 100+ hours recording everything I need, but now it's all falling apart because it's not working 😞 Any help is really appreciated.