add class

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diff --git a/2024/info/gypsum-before.md b/2024/info/gypsum-before.md
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@@ -9,11 +9,11 @@ Status: TO_CAPTION_QA
 
 # Talk
 
-<div class="vid"><video controls preload="none" id="mainVideo-gypsum"><source src="https://media.emacsconf.org/2024/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--main.webm" />captions="""<track label="English" kind="captions" srclang="en" src="/2024/captions/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--main.vtt" default />"""<p><em>Your browser does not support the video tag. Please download the video instead.</em></p></video><div></div>Duration: 24:36 minutes<div class="files resources"><ul><li><a href="https://pad.emacsconf.org/2024-gypsum">Open Etherpad</a></li><li><a href="https://media.emacsconf.org/2024/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--intro.webm">Download --intro.webm</a></li><li><a href="https://media.emacsconf.org/2024/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--main.vtt">Download --main.vtt</a></li><li><a href="https://media.emacsconf.org/2024/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--main.webm">Download --main.webm (56MB)</a></li><li><a href="https://toobnix.org/w/8yqjkevWPH7RSRzPpHb5JB">View on Toobnix</a></li></ul></div></div>
+<div class="vid mainVideo"><video controls preload="none" id="mainVideo-gypsum"><source src="https://media.emacsconf.org/2024/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--main.webm" />captions="""<track label="English" kind="captions" srclang="en" src="/2024/captions/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--main.vtt" default />"""<p><em>Your browser does not support the video tag. Please download the video instead.</em></p></video><div></div>Duration: 24:36 minutes<div class="files resources"><ul><li><a href="https://pad.emacsconf.org/2024-gypsum">Open Etherpad</a></li><li><a href="https://media.emacsconf.org/2024/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--intro.webm">Download --intro.webm</a></li><li><a href="https://media.emacsconf.org/2024/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--main.vtt">Download --main.vtt</a></li><li><a href="https://media.emacsconf.org/2024/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--main.webm">Download --main.webm (56MB)</a></li><li><a href="https://toobnix.org/w/8yqjkevWPH7RSRzPpHb5JB">View on Toobnix</a></li></ul></div></div>
 
 # Q&A
 
-<div class="vid"><video controls preload="none" id="qanda-gypsum"><source src="https://media.emacsconf.org/2024/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--answers.webm" />captions="""<track label="English" kind="captions" srclang="en" src="/2024/captions/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--answers.vtt" default />"""<track kind="chapters" label="Chapters" src="/2024/captions/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--answers--chapters.vtt" /><p><em>Your browser does not support the video tag. Please download the video instead.</em></p></video>[[!template id="chapters" vidid="qanda-gypsum" data="""
+<div class="vid qanda"><video controls preload="none" id="qanda-gypsum"><source src="https://media.emacsconf.org/2024/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--answers.webm" />captions="""<track label="English" kind="captions" srclang="en" src="/2024/captions/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--answers.vtt" default />"""<track kind="chapters" label="Chapters" src="/2024/captions/emacsconf-2024-gypsum--gypsum-my-clone-of-emacs-and-elisp-written-in-scheme--ramin-honary--answers--chapters.vtt" /><p><em>Your browser does not support the video tag. Please download the video instead.</em></p></video>[[!template id="chapters" vidid="qanda-gypsum" data="""
 03:09.370 Q: I'm curious to know how the hell guile-emacs deals with all of the dynamically scoped modules out there. Is there any effort to automatically modularize and namespace stuff?
 05:23.646 Q: Would it be possible to support a GUI toolkit other than GTK?
 06:45.257 Q: Do you plan to provide improvements to Elisp as a language, or is the focus on a compatibility layer to facilitate doing all new extensions, etc. in Scheme?