Feature: add "Welcome to Workspaces" video to modal

[jpmcb]

Type of feature

🍕 Feature

Current behavior

When first going to workspaces, I see the modal. We should consider embedding the product video into it as well:

https://www.youtube.com/watch?v=xpxIyR4-rRc

Suggested solution

Embed video into modal per suggestion by @bdougie

Additional context

No response

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