Adobe Spark Video Issues

[EliseAO]

I created a Spark video and trimmed individual video files WITHIN Spark that I uploaded to my project. When I was the sole owner of the project my preview looked the way I intended, yet when I invited others to view the preview, those video clips reverted to the original video file and the parts of the video I'd cut were again viewable. Is there a reason this occurred? Is there a way to prevent this from happening? Would it be best to trim the video in another video editing program before uploading it to Spark? 

[John T Smith]

No forum here... Spark https://community.adobe.com/t5/creative-cloud-services/definitive-guide-to-using-spark-content/m-p/1...