Add Dart PT-BR Course (dart-lang#5514)

Fixes dart-lang#4165

Author: atsansone

src/_includes/yt_shims.liquid

@@ -2,5 +2,7 @@
 {% assign yt-set-short = 'frameborder="0" allowfullscreen loading="lazy"' %}
 {% assign yt-watch = 'https://www.youtube.com/watch' %}
 {% assign yt-embed = 'https://www.youtube.com/embed' %}
+{% assign yt-embed-playlist = 'https://www.youtube.com/embed/playlist?list=' %}
 {% assign yt-playlist = 'https://www.youtube.com/playlist?list=' %}
+{% assign yt-embed-series = 'https://www.youtube.com/embed/videoseries?list=' %}
 {% assign yt-std-size = 'width="560" height="315"' %}

src/resources/videos.md

@@ -17,15 +17,29 @@ TODO: If the list of videos grows, consider automating this like book.md.
 
 ## Dart videos from Google
 
-A playlist of Google-produced videos,
-ranging from 5-minute talks on Dart asynchrony support
+A playlist of Google-produced videos on Dart's capabilities.
+These range from 5-minute talks on Dart asynchrony support
 to the Dart session from Google I/O 2019.
 
 <iframe
   {{yt-std-size}}
   title="Watch the talks on Dart asynchrony support"
-  src="{{yt-playlist}}{{page.dart-playlist-id}}"
+  src="{{yt-embed-series}}{{page.dart-playlist-id}}"
   {{yt-set}}>
 </iframe>
 
-[Playlist: Dart videos](https://www.youtube.com/playlist?list={{page.dart-playlist-id}})
+[Playlist: Google Dart videos]({{yt-playlist}}{{page.dart-playlist-id}})
+
+## Dart training course in Brazilian Portuguese
+
+Nesta série de vídeos estudaremos juntos a linguagem Dart.
+
+<iframe
+  {{yt-std-size}}
+  title="Watch the talks on Dart asynchrony support"
+  src="{{yt-embed-series}}PLK5FPzMuRKlyiWZUUqea2Hmszhy9vUixJ"
+  {{yt-set}}>
+</iframe>
+
+
+[Playlist: Dart Curso Completo]({{yt-playlist}}PLK5FPzMuRKlyiWZUUqea2Hmszhy9vUixJ)