content: add links to Gophercon 2019 videos

Change-Id: I7f084729b549a6d83b6ca485185e171b0df3a301
GitHub-Last-Rev: 27a7458be67a9631271aee2980f5781127859cb3
GitHub-Pull-Request: golang/blog#24
Reviewed-on: https://go-review.googlesource.com/c/blog/+/192138
Reviewed-by: Andrew Bonventre <andybons@golang.org>
Run-TryBot: Andrew Bonventre <andybons@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/content/experiment.article b/content/experiment.article
index 6a964b9..7255f3e 100644
--- a/content/experiment.article
+++ b/content/experiment.article
@@ -6,8 +6,9 @@
 
 * Introduction
 
-[This is the blog post version of my talk last week at Gophercon 2019.
-We will add a video link to the talk once it is available.]
+This is the blog post version of my talk last week at Gophercon 2019.
+
+.iframe //www.youtube.com/embed/kNHo788oO5Y?rel=0 309 549
 
 We are all on the path to Go 2, together,
 but none of us know exactly where that path leads
diff --git a/content/why-generics.article b/content/why-generics.article
index b359cf1..1881e77 100644
--- a/content/why-generics.article
+++ b/content/why-generics.article
@@ -6,8 +6,9 @@
 
 * Introduction
 
-[This is a version of a talk presented at Gophercon 2019.
-Video link to follow when available.]
+This is the blog post version of my talk last week at Gophercon 2019.
+
+.iframe //www.youtube.com/embed/WzgLqE-3IhY?rel=0 309 549
 
 This article is about what it would mean to add generics to Go, and
 why I think we should do it.