You might be able to do a search via PowerShell using Get-ItemProperty to obtain and parse file attributes.
The key being that there is some attribute that uniquely provides or otherwise indicates the desired specific type of VR video.
Should be fairly straightforward to conduct a couple of tests.
Just execute the Get-ItemProperty command on several files that you know are the specific type of video required.
Then do the same command on other types of files. You may discover some attribute that will uniquely identify the desired VR videos.
Once that attribute is identified or otherwise known then the search criteria can be filtered to the applicable value.
References:
https://www.saotn.org/working-with-file-attributes-in-powershell/
And the following link involves videos:
https://stackoverflow.com/questions/9420055/enumerate-file-properties-in-powershell
Notice the reference to Shell.Application COM.....
It does appear that the required search could become a bit cumbersome.
At least work with Get-Item Property and look for some identifier that applies.
Then the next step is to set up a script that will automate what needs to be done.