Hi,
As per your request, we are giving you some easy steps.
In order to remove Video Section, follow below steps, Go to Dashboard -> Appearance -> Customize -> Theme Settings -> Intro Video Section -> Do you want this section? -> Disable it from there.
And in order to review your second and third points, we would need your login credentials.
Make a user for us, assign administrator role and send us the username and password with the Site URL at [email protected]
Thanks