Add video links

Author: dspinellis

README.md

@@ -520,6 +520,8 @@ $ git issue show [Tab]
 e6a95c9 - New issue entered from the command line
 ```
 
+## See also
+The video of a presentation of *git issue* at [FOSDEM 2020](https://fosdem.org/2020/schedule/event/git_issue_management/) is available [for streaming](https://video.fosdem.org/2020/H.2215/git_issue_management.webm) or [download](https://video.fosdem.org/2020/H.2215/git_issue_management.mp4).
 
 ## Related work
 * [deft](https://github.com/npryce/deft) developed in 2011 is based on