All of those solutions are great solutions, by the way. It's a quick-and-useful alternative to MediaInfo, that one somewhat-inappropriately-named program in the accepted answer by or other on-computer programs.
The screenshots below are for the old URL, but the process/interface is the same as with the new URL. If you want an online, drag-and-drop way to get every piece of metadeta, specifications, etc., (actually a lot of info, see the screen-cap), use (Edit) Online GUI and Command-Line options.
