VideoSegment constructor
Creates a new VideoSegment.
The videoUri source should either be a full path, an URI
or if it is an asset the relative path as specified in
your pubspec.yaml
file.
Remote resources are not optimized and therefore should be downloaded
in advance and then passed to the editor as local resources.
The startTime represents the start time of the video segment within the
composition (in seconds) and the endTime the end time of the segment.
Implementation
VideoSegment(this.videoUri, {this.startTime, this.endTime});