Thanks for the comments
Ian, I'll try capcut, it should be a real time saver.
I considered using Raxx's animated texture script and foolishly thought it would be quicker to use chorma key (e.g. the train window is green and replaced in pinnacle with digby using chroma key). If I did this again I would use Raxx's script. It would also make the dog house transitions so much easier, I think the first transition from still inside the dog house to video overlay worked well, but near the end, where the video overlay switches from video overlay to a still inside the dog house, it is not aligned very well (I was running out of time).
Built in animated textures would be very useful, I used Raxx's script in "other world" video for the steam effect. I recall I had a problem where it would sometimes stop working / had to restart animator but can't remember the details.
@Steve if you had time to consider animated textures it would be great.