The video, Marnie Hall talked about how can writing a cover letter.

What's a Cover Letter?
A cover letter is a written way of introducing yourself. It usually accompanies a resume or another kind of business letter.

Writing a Cover Letter

Cover letter are easy to  write if we think of them as being in three parts.There's

An opening section
A middle section
A closing section
However, make sure that you include:
Name
Address
Date
At the top of the letter,and underneath that, include the recipient's name, business name,address before a salutation,

Extra Tips for Writing a Cover Letter
 A couple of extra tips:
Be sure that when you're writing a cover letter, that you write to someone specifically.For example, if you're inquiring about a job interview, write to the person directly in charge of hiring. Also, always make sure to sign your letter.It looks very unprofessional if you don't.

I'm learning about that but unfortunately, or fortunately, I don't need the job here.But appreciate for helping us.
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