Hi. I´m American, but live in Brazil for over 30 years, and am highly immersed in the local culture and language. My work here includes translation, proofreading and editing, writing of original texts, various types of research, and other skillsets. I often prepare lessons on environmental issues for local groups I work with here, and use Powerpoint. I am interested in your job, but would like more details about what you need. Will your video lessons be in Portuguese or English? Will they be filmed, text or computer graphics? Please contact me with more information, so I can judge my capacity to help you and give you a valid bid.