Each time you visit a website with "downloadable video contents" the IDM
panel pops out prompting you to "Download this video"
To switch it to "mini-mode" thus occupying less space on your screen:
- Open IDM
- Click on Download > Options > General tab
- Next to the "Customize IDM Download panels in browsers", click on Edit
- A new dialog shall open, in the "Panel View" section (present in both tabs) click on "Mini mode"