Catch dropped files/datablock with python

Some files can be dropped into some area of blender. For instance drop a movie from the explorer to the vse will create a movie strip. Is there a way from bpy ta get this created datablock? or at least the source of the file that was dropped?

I tried to use depsgraph_update_pre and depsgraph_update_post handlers to compare strips before and after drop but unfortunatly both handlers have the same content at this moment. I don’t see other available handler that could be used for it.