Merge pull request #2449 from VipulMSFT/patch-15

Update mdo-sec-ops-guide.md

Author: chrisda

defender-office-365/mdo-sec-ops-guide.md

@@ -71,6 +71,10 @@ Incident queue management and the responsible personas are described in the foll
 
 ### Manage false positive and false negative detections
 
+> [!TIP]
+> - For a quick overview on how to manage false positives, check out this short video: <https://youtu.be/yuduVj6wvsw>
+> - For a quick overview on how to get started with false negative investigations, check out this short video: <https://youtu.be/sFMAI8MeDKQ>
+
 In Defender for Office 365, you manage false positives (good mail marked as bad) and false negatives (bad mail allowed) in the following locations:
 
 - The [Submissions page (admin submissions)](submissions-admin.md).
@@ -133,6 +137,9 @@ Campaign Views reveals malware and phishing attacks against your organization. F
 
 ## Ad-hoc activities
 
+> [!TIP]
+> For a quick overview on how to investigate email messages in Microsoft Defender for Office 365, check out this short video: <https://youtu.be/5hA7VfaMvqs>.
+
 ### Manual investigation and removal of email
 
 |Activity|Cadence|Description|Persona|