A:AnswerYes it will hold the Galaxy Note 20 in landscape position not portrait position. This is the case with most phones. Yes it has attachments for small cameras and GoPros. It's a great little tripod and selfie stick.
A:AnswerYes... according to the box.
Have not used it in this capacity, but box specifies phone, gopro, and traditional camera use.
Pictures on box also show that.
A:AnswerI cannot answer that question as I have not took mine out of the box yet. I am waiting on family before I use it. Apologize I couldn't be of any assistance.