just tried drag&drop feature in library manager but there is a problem.
After first drag&drop the Library manager “freeze”, you canot select any other thumbnail.
Workaround is to not sigle-click but doucle-click a thumbnail that will “unfreeze” the library manager (all other NCS feature/icons are OK so NCS interface is not globally impacted) and doing this sometime also lauch VLC on the double-clicked thumbnail.
Also drag&drop is very slow … 22 seconds for a 20MB video on my local Core-I3 ? clicking the download button do it much faster.