chore: add warning about old videos

Signed-off-by: Victor Adossi <vadossi@cosmonic.com>

Author: vados-cosmonic

component-model/src/reference/videos.md

@@ -16,10 +16,22 @@ This page is a non-exhaustive list of some of the best talks and videos related
 
 ## Full Conference playlists
 
+> [!WARNING]
+> Exercise caution when watching conference talks and videos older than ~2024.
+>
+> WebAssembly specifications have changed quite a bit since 2023 and proposed versus implemented
+> semantics (Component Model, WIT, etc) have seen considerable improvements.
+>
+> For example, ["WITX"][witx] became [WIT][wit], with many improvements along the way. Talks that mention
+> WITX may contain valuable insight, but are no longer up to date.
+
 ### Wasm I/O
 
 [Wasm I/O 2025 Playlist](https://www.youtube.com/playlist?list=PLP3xGl7Eb-4OtFH1tcQm6u7_LRED7-3rg)
 
 [Wasm I/O 2024 Playlist](https://www.youtube.com/playlist?list=PLP3xGl7Eb-4Nmj4CJ5WLQZx5UAYvhH920)
 
 [Wasm I/O 2023 Playlist](https://www.youtube.com/playlist?list=PLP3xGl7Eb-4NtSX-wzOxUCjPsBcw2zrPA)
+
+[witx]: https://github.com/WebAssembly/WASI/tree/main/legacy/preview1/witx
+[wit]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/WIT.md