Did your vinyl background get creased?
Don't worry! This problem can be solved!
Vinyl fabric has such a wonderful property as elasticity, it becomes even under heat.
To smooth a vinyl photo background with an iron, turn it face down, put the lining on top and iron until the folds are smoothed.
In the video, I took a sheet of paper as a lining, it coped with his task, you can also use gauze or a piece of cloth.