https://www.youtube.com/watch?v=1RwJbhkCA58
Video 2:
https://www.youtube.com/watch?v=SYk29tnxASs
Video 3:
https://www.youtube.com/watch?v=MxxDG8OE92g&t=365s
Other guides:
Designing conference posters ยป
Mike Morrison's Poster Template:
Powerpoint poster templates for research poster presentations
Free Powerpoint Scientific Research Poster Templates for Printing