adding coverage transcript (#1537)

Co-authored-by: Phil Hawksworth <phil@deno.com>

Author: thisisjofrank

examples/videos/deno_coverage.md

@@ -4,3 +4,39 @@ url: /examples/deno_coverage/
 videoUrl: https://www.youtube.com/watch?v=P2BBYNPpgW8
 layout: video.tsx
 ---
+
+## Description of video
+
+We updated `deno coverage` in 1.39 with a better output and HTML generation.
+
+## Transcript and code
+
+If you're using `deno test`, have you checked out `deno coverage`?
+
+`deno coverage` is a great way to see how much test coverage you have, just add
+the coverage flag to Deno test:
+
+```sh
+deno test --coverage
+```
+
+This will save coverage data to `/coverage`. Then run the coverage command:
+
+```sh
+deno coverage ./coverage
+```
+
+to see a coverage report.
+
+In Deno 1.39, `deno coverage` was updated in two ways; first it now outputs a
+concise summary table and second, if you add the `--html` flag:
+
+```sh
+deno coverage ./coverage --html
+```
+
+the coverage tool generates static HTML so that you can explore your coverage in
+a browser.
+
+We got more plans for Deno coverage, like simplifying the steps into a single
+command and more.