fix broken links

Author: PhilKang0704

articles/cost-management-billing/costs/cost-mgt-best-practices.md

@@ -203,7 +203,7 @@ For more information, see [Azure Advisor](/azure/advisor/advisor-overview).
 
 VM sizing has a significant impact on your overall Azure cost. The number of VMs needed in Azure might not equate to what you currently have deployed in an on-premises datacenter. Make sure your choose the right size for the workloads that you plan to run.
 
-For more information, see [Azure IaaS: proper sizing and cost](https://azure.microsoft.com/resources/videos/azurecon-2015-azure-iaas-proper-sizing-and-cost/).
+For more information, see [Azure IaaS: proper sizing and cost](/shows/microsoft-azure-azurecon-2015/acon210).
 
 ### Use purchase discounts