Affidavit of support is basically a contract between a sponsor and US government. It means you are going to be financial responsible for the person your are sponsored to come in US. The affidavit of support is called form I-864 and in order to apply for that you need to go to www.uscis.gov click on form and select form I-864. In this video I show basically how to find information about filling out the form.
I hope you like the video and thank you.