I've tested with 3 files (including MP4-files and web overlays) and I've
had always the same effect. In all 3 cases I used a file of CC2015,
opened that file in CC2017, changed a picture and exported an article
file. The result were the very big files.Then I installed CC2015 again
and installed the Digitalpublishing tools for CC 2015 manually. Then I
retry the same workflow (with the same files and changes!) and all it's
okay. Only if I use the test files of yesterday again, I have the
strange e...