How Can I Recover WeChat Videos From iCloud Backup?

I need to find an important video from a conversation because I am not allowed to download recently. I am not sure if this video is stored on my iCloud backup or not. Is there any way I can preview and get them back? Thanks! Most iOS users have already known how to back up iPhone with iTunes and iCloud. Have you ever thought about checking and extracting data from iCloud backup to PC/Mac. So where are iPhone backups stored? How can you recover WeChat videos from iCloud backup? The answer ...