Embed-link Milvus setup how-to video on Milvus connector pages (#273)

Author: Paul-Cornell

snippets/general-shared-text/milvus.mdx

@@ -4,4 +4,14 @@ The Milvus prerequisites:
 - The [URI](https://milvus.io/api-reference/pymilvus/v2.4.x/MilvusClient/Client/MilvusClient.md) of the instance.
 - The [username and password, or token](https://milvus.io/docs/authenticate.md) to access the instance.
 - The name of the [database](https://milvus.io/docs/manage_databases.md) in the instance.
-- The name of the [collection](https://milvus.io/docs/manage-collections.md) in the database.
+- The name of the [collection](https://milvus.io/docs/manage-collections.md) in the database.
+
+<iframe
+width="560"
+height="315"
+src="https://www.youtube.com/embed/tl9eV-_nAHI"
+title="YouTube video player"
+frameborder="0"
+allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+allowfullscreen
+></iframe>