tumble dryer screeching noise

This is a bit odd, the tumble dryer makes a screeching noise only on the startup for 30secs https://photos.app.goo.gl/Y3VJCoQc843on8qc9 In the video the screeching only starts after 30seconds and and then lasts for 30seconds. If it was a motor/bearing/pulley then I would expect the noise to...