Question: how to download youtube videos with subtitles idm?
Answer: You need to open "Options->General" IDM dialog and press "Edit" near "Customize IDM Download panels...". Then press "Add" (arrow 1 on the image) and add SRT (or VTT) file type (arrow 2 on the image). After this play video again and IDM will add download option for subtitles on its video download panel.