Some MLS's provide Virtual Tours in their IDX feed. In those cases, those Virtual Tour links will automatically be displayed with listing data on your IDX pages. You can control how MLS provided Virtual Tours are displayed on your IDX pages by going to My Preferences -> Global Preferences -> Results Page Options. Use the "Show MLS provided Virtual Tours" to choose one of the following options.

All - Display the virtual tour link when ever it is provided.
Agent - For Single Agent Accounts, display MLS provided virtual tours on any property that has you has your agent ID.
Office - For Office Accounts, display MLS virtual tours on any property that has your office ID.
None - Never display MLS provided virtual tours.

Any virtual tours you add via the IDX Broker system will supersede a virtual tour provided by the MLS. 

Click here for a video demonstration of virtual tours.