diff --git a/docs/MIGRATION_PLAYBOOK.md b/docs/MIGRATION_PLAYBOOK.md
index ab6272c..786fc11 100644
--- a/docs/MIGRATION_PLAYBOOK.md
+++ b/docs/MIGRATION_PLAYBOOK.md
@@ -55,6 +55,7 @@
 - `if(typeof c==="function")` guard (counter race fix).
 - foreign 8148 classes (`vdo-blk-*`) → site-native (`vi-limiter` etc.) (R5).
 - Playwright probe → pageerrors empty.
+- **Cleanup dead videojs CSS** — `.video-js`, `.vjs-*`, `@keyframes vjs-*`, `.waiting .loading-spinner` rules **видалити** з `views/static/css/index.css` + `views/css/css_<page>.etlua` (для video page) AFTER player migrated. Залишити **тільки** якщо site has окремі pages що ще videojs (embed.etlua, id_xvideos.etlua module — conditional render). Не видалити `views/static/css/video-js.css` файл (used by embed iframe).
 
 ### Branch S (Spot ID rotation) — якщо A2=yes