Altered Scale over Dominants

Here is a nugget from an Emily Remler video on Dominants:

• Dominants either resolve to a tonic (as in a ii-V-I) or not.
• If the dominant resolves to a tonic, use the 7th mode of the Jazz Minor (melodic Minor).  This means start the scale on the seventh tone.  The 7th mode of the Jazz Minor is equivalent to the 'Altered Scale'.
• If the dominant is not resolving to a tonic, use the 5th mode of the Jazz Minor (melodic minor).