Improve responsive on medium destkop screens

client/src/sass/application.scss

@@ -2,6 +2,7 @@
 @use 'sass:color';
 
 @use '_variables' as *;
+@use '_bootstrap-variables' as *;
 @use '_mixins' as *;
 @use '_icons' as *;
 
@@ -223,7 +224,7 @@ my-global-icon[iconName=external-link] {
   }
 }
 
-@media screen and (max-width: #{breakpoint(lg)}) {
+@media screen and (max-width: #{breakpoint(xl)}) {
   .main-col {
     --videosHorizontalMarginContent: #{pvar(--horizontalMarginContent)};
   }

support/doc/tools.md

@@ -373,7 +373,7 @@ peertube-runner [commands] --id instance-2
 peertube-runner [commands] --id instance-3
 ```
 
-You can change the runner configuration (ffmpeg threads, ffmpeg nice etc) by editing `~/.config/peertube-runner-nodejs/[id]/config.toml`.
+You can change the runner configuration (jobs concurrency, ffmpeg threads/nice etc) by editing `~/.config/peertube-runner-nodejs/[id]/config.toml`.
 
 ### Run the server