Add some reference DDD resources in english/spanish (#5471)

* Improve pages/markdown headings compatibility

* Add "Asombroso DDD" metalist

* Add "Domain Driven Design with PHP" playlist

"Domain Driven Design with PHP (spanish)" playlist
Carlos Buenosvinos Zamora @carlosbuenosvinos
https://www.youtube.com/playlist?list=PLfgj7DYkKH3DjmXTOxIMs-5fcOgDg_Dd2

* Add "Domain Driven Design with PHP" playlist

- Fix markdown syntax

"Domain Driven Design with PHP (spanish)" playlist
Carlos Buenosvinos Zamora @carlosbuenosvinos
https://www.youtube.com/playlist?list=PLfgj7DYkKH3DjmXTOxIMs-5fcOgDg_Dd2

* Add Codelytv "Domain-Driven Design"playlist

Domain-Driven Design (Diseño dirigido por Dominio) youtube playlist
Codely.tv
https://www.youtube.com/playlist?list=PLZVwXPbHD1KMsiA7ahRSbIwS3QMsQ0SbL

* Add CodelyTV screencasts

Codelytv screencasts
Codely.tv @codelytv
https://codely.tv/blog/screencasts

* Improve pages/markdown headings compatibility

* Add "Domain Driven Design Europe" conf screencast

Domain Driven Design Europe
https://2016.dddeurope.com/#videos
https://2017.dddeurope.com/#videos
https://dddeurope.com/2018/
https://dddeurope.com/2019/
https://dddeurope.com/2020/
https://dddeurope.com/2021/

* Add DDD Europe's First 15 years book

Domain-Driven Design: The First 15 Years. Essays from the DDD community
https://leanpub.com/ddd_first_15_years/
https://dddeurope.com/15years/

casts/free-podcasts-screencasts-en.md

@@ -43,7 +43,7 @@
 * [How to program in C# - Beginner Course \| Brackeys](https://www.youtube.com/playlist?list=PLPV2KyIb3jR6ZkG8gZwJYSjnXxmfPAl51) (screencast)
 
 
-<h3 id="cpp">C++</h3>
+### <a name="cpp"></a>C++
 
 * [C++ Programming Video Lectures](https://www.youtube.com/playlist?list=PLTZbNwgO5ebo64D1k0DJQGX30X6iSTmRr) (screencast)
 * [C++ STL](https://www.youtube.com/playlist?list=PL5jc9xFGsL8G3y3ywuFSvOuNm3GjBwdkb) (screencast)
@@ -226,6 +226,8 @@
 * [Developer On Fire](http://developeronfire.com) (podcast)
 * [Developer Tea](https://developertea.com) (podcast)
 * [DevelopersHangout](http://www.developershangout.io) (podcast)
+* [Domain Driven Design Europe](https://dddeurope.com/videos/) (screencast)
+  * [Domain Driven Design Europe - 2017](https://2017.dddeurope.com/#videos) (screencast)
 * [FLOSS WEEKLY](https://twit.tv/shows/floss-weekly) (podcast)
 * [Frontside the Podcast](https://frontside.io/podcast/) (podcast)
 * [Full Stack Radio](http://www.fullstackradio.com) (podcast)