Summary: Synthesia removes free demo tool

Why It Matters: Synthesia removed a way for people to try their product for free.

What Changed:

• Removed the "Try out our free AI Video Tool" section.
• Removed the steps for creating a demo video.
• Removed the demo video templates.
• Changed "Avatar: Alex" to "Avatars's Voice".
• Changed some internal links from https://www.synthesia.io/ to https://synthesia.io/.