I carefully watched the videos while disassembling the dryer. I replaced the pulley, drum support roller, and belt. Since the dryer is over a decade old, I would have also replaced the glides, which were worn out. However, the parts I replaced resolved the problem. One of the drum rollers was scraping the metal it was against because one of the washers was damaged, I believe. I’m not entirely certain if that was the root cause.