Update try-free.md

Embedded video into doc

Author: jaydestro

articles/cosmos-db/try-free.md

@@ -24,6 +24,8 @@ This article walks you through how to create your account, limits, and upgrading
 
 If you decide that Azure Cosmos DB is right for you, you can receive up to 63% discount on [Azure Cosmos DB prices through Reserved Capacity](reserved-capacity.md).
 
+> [!VIDEO https://www.youtube.com/embed/7EFcxFGRB5Y?si=e7BiJ-JGK7WH79NG]
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 ## Limits to free account
 
 ### [NoSQL / Cassandra/ Gremlin / Table](#tab/nosql+cassandra+gremlin+table)