(high-ish) [Planning] Merge introduction and summary

[yatil]

The Introduction seems largely redundant to me. Especially the recap of the Overview page is unnecessary. I suggest merging with the summary and going into the (faux) meat of the topic immediately.

[shawna-slh]

I think this is useful/important for people who land on this page first, e.g., from a search engine:

For background, see Making Video and Audio Accessible - Introduction that provides:

This is useful to help project managers put people first, not just checklist:

examples of user experiences to help you understand...

I think this is not absolutely necessary / vital information. Yet, I think it helps managers realize that they have competing pressures.

What accessibility features you provide with your media will likely be influenced by:

• governmental regulations and other policy requirements
• budget and time constraints
• user needs

If you want EOWG to discuss this, feel free to re-open the issue.