That is a good idea on the video tutorials there.
I can give you some text here for MER (Master Effect Reborn) Installation:
For MER version 1.0.340 and earlier:
You need to copy and paste the entire downloaded Preset to the ReShade.FX file. So the process would be like this: Open ReShade.FX. CTRL+A to highlight all the text, then delete it. Then CTRL+A All the text in the downloaded Settings Text file, CTRL+C to copy it all. Then paste it all in the Reshade.FX.
Make sure you copy the entire thing and that it's ordered the same. You can't miss anything or leave anything. (the actual shaders are in this, so it's very important to copy it right)
For versions after 1.0.340:
Open up MasterEffect.H CTRL+A all text then delete it (should be completely empty) then open up the downloaded preset CTRL+A then CTRL+C all the text in the downloaded settings then paste it all in the empty MasterEffect.H
Basically it's just a matter of copy and pasting it over the default values.
With MER you still download SweetFX_Setting(presetname).txt so you cannot just rename it to sweetfx_settings and hope it will work.
In the case of Versions including MasterEffect.H you can indeed save it as MasterEffect.H under all files and it will work when replacing the file.