Video & Audio Mismatch

I imported a quicktime video to compose to, unplugged my Focusrite then my laptop switched to my built in audio, now my my video is out of sync with it’s original dialogue track and the music I have composed. All the sample rates match. How can I fix this?

Even I plug in my focusrite it’s all still out of sync. My soundtrack and the original audio track from the video match, but the video doesn’t.

Latencies changed? Is the video how ahead of the sound?

If so, using the inbuilt card might have forced an extra delay, and if you plug the Focusrite back in, you will need to reduce the latency in its driver back down again to what it was originally.