I'm using VLC to play a music video.
I use a lot of workspaces and I would like to keep it open and pinned on top on the active workspace.
Is it possible?
Yes it is, just press Alt + Spacebar, that will bring the window menu. You have an option there that says Always on Top.
You can get that menu by right clicking on the top of the window when it's not maximized.
If would like the window to always remain on the current active workspace hit Alt + Spacebar again and select Always on Visible Workspace.