DownloadVideo already handles the Panopto Login.aspx canvas auth form
correctly through its multi-step form submission logic. The real fix for
ExternalUrl Panopto folder links was the URL normalization (List.aspx?folderID=
→ List.aspx#folderID="...") already in DownloadVideo.
Remove DownloadExternalPanoptoURL (dead code) and all debug prints.
Update README with -vo flag documentation.
Joren
2776d057cd