Movie maker was bundled in Windows Essentials and MS no longer have it available for download. It definitely works in W7-10.
This microsoft forum says there is a copy on archive.org but I couldn't get it to work.
I have no idea why is says "Redirecting" here. It is just a link to Microsoft. If you hover over the link you will see the actual URL at the bottom of the screen in the status bar.
If you are feeling really brave I have the installer here. It's 130MB and I could mount it up on a google drive. I have taken great care not to lose it. I recently installed in on W10 and it works fine.
The file is signed by Microsoft and you could verify that yourself so I think it should be safe. I have no real idea about these signatures myself.
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