How it works:
When the 'Start recording' button is pressed a popup window appears on top of the screen showing you that OBS is recording You can left-click and drag the window to position it. This script was made using Python and tkinter library.
You can enable or disable the Timer in the properties
The window sticks to the edges of the screen.
Pause and unpause supported
The window is always on top (*negative feature: full screen programs are not supported :c )
Download the python-3.6.8-embed-amd64.rar that includes a Python compatible package with the necessary libraries.
Open OBS and go to - Tools - Scripts.
Configure the Python installation path by selecting the extracted folder.
Go to Scripts tab, click the + button and add the "obs_recording_notification.py" file.