I would like to ask you for some video lessons of ancient greek. (In french or english. As far as I know there are none in portuguese.)
The Center for Hellenic Studies sponsored by Harvard University has a series of video lessons based on Hansen & Quinn’s Greek:An Intensive Course. Some think that H&Q’s text is a little too intense for an introductory textbook, but the videos provide a nice summary of the main points.
https://www.chs.harvard.edu/CHS/article/display/6461.programs-self-directed-landing
One of the playlists included in the link that Aetos has shared is a good one, consisting of 118 videos in total. That one, I think, is the best playlist for learning Ancient Greek, at least for beginners: https://www.youtube.com/watch?list=PLq5ea-jR9u2puDaLoRL-nBkpwrkURbLjT&v=CGYUXZJ15RI&feature=emb_logo
Four other video options I’m aware of:
Greek 101: Learning an Ancient Language - A paid course from The Great Courses Company.
Al Duncan’s YouTube Channel - Lectures that follow C. W. Shelmerdine’s Introduction to Greek.
Walter Robert’s YouTube Channel - Lectures that follow Pharr’s Homeric Greek.
Amy R. Cohen’s Youtube Channel - Lectures that follow Greek: An Intensive Course by Hardy Hansen and Gerald Quinn.