I don't want to have to click the playlist button every time. There's plenty of room on most desktop screens for a sidebar. It doesn't matter if it's left or right of the content stream. That would be better as an adjustable option.
Just make sure the sidebar and content stream are centered as one element. I believe if it's aligned to the left/right margins it will appear out of place. And may not load properly on low res screens or desktop for mobile.