fix: take andrzej feedback into account

[Becheler]

Before submitting

• This PR targets the develop branch.
• I searched for an existing PR or issue covering the same change.
• My contribution is licensed under the Boost Software License 1.0.

Type of change

• Bug fix
• New feature or API addition
• Refactor (no behavior change)
• Documentation
• Build, CI, or tooling
• Other (specify below)

Does this PR introduce a breaking change?

• Yes (describe migration impact below)
• No

What this PR does

1. Increase length of video
2. Make the link explicit between the video and the example
3. Clean up the example code as recommended by Andrzej
4. Add an Author and How to Cite section

Motivation

See recent Boost Mailing List poll.

Testing

Checklist

• Existing tests pass (b2 in the test/ directory).
• New behavior is covered by a test, or this is a docs / build / refactor change.
• Documentation was updated if user-facing behavior changed.
• No new compiler warnings on the platforms I built against.

[cppalliance-bot]

An automated preview of the documentation is available at https://509.graph.prtest3.cppalliance.org/index.html

If more commits are pushed to the pull request, the docs will rebuild at the same URL.

2026-06-20 15:25:14 UTC

[github-actions]

Compiler-warning counts vs develop (auto-generated).
PR run 27875361502 vs develop run 27866501982 (8ed6e4148b).

Job	Baseline	After	Delta
macos (clang, 14)	46	46	0
macos (clang, 17)	41	41	0
macos (clang, 20)	41	41	0
ubuntu (clang-19, 14)	46	46	0
ubuntu (clang-19, 17)	46	46	0
ubuntu (clang-19, 20)	46	46	0
ubuntu (clang-19, 23)	46	46	0
ubuntu (gcc-14, 14)	28	28	0
ubuntu (gcc-14, 17)	28	28	0
ubuntu (gcc-14, 20)	28	28	0
ubuntu (gcc-14, 23)	28	28	0
windows_msvc_14_3 (msvc-14.3)	974	974	0