Ratting noise at very start of cycle, before drum spins

[Lm81]

I have a 4 year old zanussi lindo 300 and it has started making an unusual noise. The noise is a ratting sound which happens at the very beginning of the cycle, before the drum even starts moving or water comes in. Once the water starts filling and drum starts moving the noise stops and everything continues normal. I am worried that if I don't address the cause of the rattling sound, more damage will occur. I've searched endlessly on Google but can't find anything specifically relating to noises before the drum starts moving. I have attached a short video where you can hear the noise quite clearly. Any ideas would really be appreciated! Thanks in advance.