Here are videos that I’ve found in Youtube that show how to make fabric rosebuds. The first four videos show rosebuds from satin fabric and the last one is rosebuds from spandex shirts.
All of the rosebuds created in the following videos only use long fabric scraps, glue gun, thread, and needle. They are made by rolling and folding the fabric while being glued once in a while. When finished, the results are lovely fabric rosebuds that resemble the real ones.
The main differences about the rosebuds are the length of the materials used and the beginning of the process. Some tutorials have complex folds at the beginning while the others not. The length of the materials also affects the outcome; the longer the materials the bigger and rounder the rosebuds will be (as you will see on the last video).
The last video is the spandex shirt rosebud tutorial. Since the fabric is stretchy, you can pull it while rolling and folding it into a rosebud. As the result, you will get a perfect round rosebud unlike the firs videos that result in triangle rosebuds. The method used to secure the folds is by using thread and needle.