The WhatsApp backup feature of this tool is free to use, unlike iCloud.
Too many videos in your conversations can take up too much space and slow down or even stall the backup process.
This time we have received a query on a stuck WhatsApp backup to iCloud.
If it is running low on free space, it cannot complete the backup process.
Hopefully, you were able to fix your WhatsApp backup easily.
Here is when you can't complete backup whatsapp iphone.