YSK VHS video cassettes degrade over time. Under average conditions, the tapes have a life expectancy of about 30 years. Those tapes laying around from the 90's with precious family memories are already significantly degraded. You should look to digitize all of your families VHS tapes now.
from /r/YouShouldKnow
YSK VHS錄像帶會隨着時間的推移而退化。在平均條件下，磁帶的預期壽命約爲30年。那些躺在90年代的帶有珍貴家庭記憶的磁帶已經明顯退化了。你應該現在就把你家裏所有的VHS磁帶數字化。