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diff --git a/2020/info/13.md b/2020/info/13.md
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 # Experience Report: Steps to "Emacs Hyper Notebooks"
 Joseph Corneli, Raymond Puzio, and Cameron Ray Smith
 
-[[!template id=vid src="https://mirror.csclub.uwaterloo.ca/emacsconf/2020/emacsconf-2020--13-experience-report-steps-to-emacs-hyper-notebooks--joseph-corneli-raymond-puzio-cameron-ray-smith.webm"]]  
+[[!template id=vid src="https://mirror.csclub.uwaterloo.ca/emacsconf/2020/emacsconf-2020--13-experience-report-steps-to-emacs-hyper-notebooks--joseph-corneli-raymond-puzio-cameron-ray-smith.webm" subtitles="/2020/subtitles/emacsconf-2020--13-experience-report-steps-to-emacs-hyper-notebooks--joseph-corneli-raymond-puzio-cameron-ray-smith.vtt"]]  
 [Download compressed .webm video (8.6M)](https://mirror.csclub.uwaterloo.ca/emacsconf/2020/smaller/emacsconf-2020--13-experience-report-steps-to-emacs-hyper-notebooks--joseph-corneli-raymond-puzio-cameron-ray-smith--vp9-q56-video-original-audio.webm)
 
 We present a short experience report from the perspective of two
diff --git a/2020/info/14.md b/2020/info/14.md
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 # README-Driven Design
 Adam Ard
 
-[[!template id=vid src="https://mirror.csclub.uwaterloo.ca/emacsconf/2020/emacsconf-2020--14-readme-driven-design--adam-ard.webm"]] 
+[[!template id=vid src="https://mirror.csclub.uwaterloo.ca/emacsconf/2020/emacsconf-2020--14-readme-driven-design--adam-ard.webm" subtitles="/2020/subtitles/emacsconf-2020--14-readme-driven-design--adam-ard.vtt"]] 
 [Download compressed .webm video (21.4M)](https://mirror.csclub.uwaterloo.ca/emacsconf/2020/smaller/emacsconf-2020--14-readme-driven-design--adam-ard--vp9-q56-video-original-audio.webm)
 
 Many source code projects these days begin with a README file. While
diff --git a/2020/info/15.md b/2020/info/15.md
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 # Moving from Jekyll to OrgMode, an experience report
 Adolfo Villafiorita
 
-[[!template id=vid src="https://mirror.csclub.uwaterloo.ca/emacsconf/2020/emacsconf-2020--15-moving-from-jekyll-to-orgmode-an-experience-report--adolfo-villafiorita.webm"]]  
+[[!template id=vid src="https://mirror.csclub.uwaterloo.ca/emacsconf/2020/emacsconf-2020--15-moving-from-jekyll-to-orgmode-an-experience-report--adolfo-villafiorita.webm" subtitles="/2020/subtitles/emacsconf-2020--15-moving-from-jekyll-to-orgmode-an-experience-report--adolfo-villafiorita.vtt"]]  
 [Download compressed .webm video (13.8M)](https://mirror.csclub.uwaterloo.ca/emacsconf/2020/smaller/emacsconf-2020--15-moving-from-jekyll-to-orgmode-an-experience-report--adolfo-villafiorita--vp9-q56-video-original-audio.webm)
 
 I have been a long time user of static site generators, such as