"should always and always", Is it a idiomatic expression, is it informal or formal?

Question

This video is saying (https://youtu.be/yXJYRlxkfu4?t=407)

So remember when you use a verb immediately after as well as it should always and always be in the ‘ing’ form.

I googled "should always and always" and found lots of people use this expression.

Is it a idiomatic expression, is it informal or formal?

Answer 1

In fifty years of speaking English, I have never heard this expression.

I have heard should always, always, but it's pretty informal.