I have created a free video tutorial on how to convert 16:9 video to 1:1 Video. 7 out of the top 10 branded videos on Facebook used
the Square format.
How to Make Square Videos for Facebook using Final Cut Pro X
hope this helps someone. Aron Ranen
DVworkshops.com
I will be teaching a 2-Day Final Cut Pro X course in Los Angeles October 15-16, 2018 10am-7pm in Marina Del Rey
more info at this link
2 Day Final Cut Pro X Course