Step#1: Go to AI Video Thumbnail Prompt Engine
Step#2: Copy your Blog Post Title and paste in the prompt box. Hit "Enter".
Step#3: Ask: which one is the best suitable for my title?
Step#4: Copy the best prompt
Step#5: Go to Ideogram.ai
Step#6: Set the image size
Step#7: Paste the copied prompt. Hit "Enter".
... that's it.