MetaData Extractor - get date field from MOV or JPG

Question

I'm writing something that moves images/videos captured off a camera or smart phone. So there is a mix of .jpg from camera or smartphone, .mov files (iphone movies), .png (screen caps etc).

In the first instance want a file created time (as opposed to file write time).

I found in the examples how to pull a specific value from a jpg:

IEnumerable<MetadataExtractor.Directory> directories = MetadataExtractor.ImageMetadataReader.ReadMetadata(filename);
var subIfdDirectory = directories.OfType<MetadataExtractor.Formats.Exif.ExifSubIfdDirectory>().FirstOrDefault();
var dateTime = subIfdDirectory?.GetDescription(MetadataExtractor.Formats.Exif.ExifSubIfdDirectory.TagDateTimeOriginal);

and I found how to get it from a .MOV file

var subIfdDirectory = directories.OfType<MetadataExtractor.Formats.QuickTime.QuickTimeTrackHeaderDirectory>().FirstOrDefault();
var dateTime3 = subIfdDirectory?.GetDescription(MetadataExtractor.Formats.QuickTime.QuickTimeTrackHeaderDirectory.TagCreated);

But it all seems a little clunky to have to determine the specific format, and then pull the specific tag directory.

Is there a more generic:

IEnumerable<MetadataExtractor.Directory> directories = MetadataExtractor.ImageMetadataReader.ReadMetadata(filename);
var dateTime = directories.GetTag(TagDateTimeOriginal)
if (dateTime != null) <use value here>
dateTime = directories.GetTag(TagCreated)
if (dateTime != null) <use value here>

Or are there other examples that may be closer than my original code.