[Docs]: Improve home page cards

[TomFern]

Type

Bug report

What do you want to report?

• [ ] Convert/reshoot the GIF (visual builder) to webm/mp4 for performance
• [ ] Make thumbnails the same size/aspect ratio

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[TomFern]

We'll get the help from Aiste for this one hopefully.