Summary: Synthesia adds free demo tool

Why It Matters: This makes it easier for new users to try Synthesia.

What Changed:

• A new section called "free demo" was added.
• This section lets users try out the AI video tool directly on the page.
• It includes options to select an AI avatar, type a script, and get a demo video.
• Several customer testimonials with links to case studies were added near the top of the page.
• The "Get started" button link changed from /pricing to /pricing.