At the time of writing this you can indeed do this sort of endless zoom effect within the app. When you drag a photo into deep dreamer export it as a movie and under the deep dream tab drag the scale coefficient option which is how fast it will zoom into the image. Levels will effect the duration.
Hope this helps.
Still cannot emphasise this thread enough but I am loving the app so far. Was hesitant at first but it's far more approachable then all the various methods I tried out before purchasing this app. Would definitely recommend.
THIS!
I bought this primarily for video and was astounded that wasn't featured in the code, this NEEDS to be an update otherwise the video function is useless.