this video shows you how to use Disk Cleanup to perform a basic cleanup (temporary files) and an advanced cleanup (deleting restore points, deleting system files, etc.). I checked the list and couldn't find any videos covering Disk Cleanup. This video is actually applicable to both Windows 10 and Windows 7, but someone's probably already made a Windows 7 tutorial by now and the screenshots were primarily made in Windows 10's disk cleanup.
I actually took a few screenshots and threw them together in PowerPoint. The video's framerate is not spectacular, as exporting the PowerPoint as a video file at even the high quality settings produces a poor framerate. The PowerPoint plays at a decent framerate in the program itself, so I could've recorded it playing using a screen recorder, but it's too late now.
I also forgot to cover the definition of "previous windows installations" at the end of the video with the other types of temporary files that Disk Cleanup can delete, but that's an entirely topic altogether anyway.
I didn't cover "option two" of the Disk Cleanup tutorial because I felt that this would be way to much information to process in a video, but I'll leave a link to the tutorial in the video description. Maybe it will be a separate video.
Disk Cleanup - Open and Use in Windows 10 - Windows 10 Forums