Add metadata viewer script

README.md

@@ -51,6 +51,32 @@ Manual grouping uses filesystem items, not media-file detection:
 - one empty directory does nothing
 - multiple files/folders are grouped as selected, without flattening folder contents
 
+### `view_metadata.py`
+
+Show all readable metadata for the first file provided:
+
+```bash
+python3 view_metadata.py path/to/file/or/directory [...]
+```
+
+This script only displays one file. If several files are given, it displays the first one. If a directory is given, it searches recursively and displays the first file it finds.
+
+It runs ExifTool as:
+
+```bash
+exiftool -a -u -ee -G0:1 -s file
+```
+
+The important choices are:
+
+- `-a` shows duplicate tag names instead of hiding later duplicates.
+- `-u` includes unknown tags ExifTool can identify well enough to print.
+- `-ee` extracts embedded metadata where ExifTool supports it, which is useful for some video/container formats.
+- `-G0:1` shows both the broad metadata container and the more exact location, such as `EXIF:IFD0` or `QuickTime:Track1`.
+- `-s` uses compact tag names, which are easier to copy into scripts than the descriptive labels.
+
+The old `-G` style shows broad groups like `EXIF`, `File`, or `QuickTime`. That is readable, but it can hide where inside a container a value came from. Family 1 groups, from `-G1`, show more exact locations like `IFD0`, `ExifIFD`, `MakerNotes`, or `Track1`, but sometimes lose the broader context. `-G0:1` combines both, so it is the most useful default for debugging metadata without changing which normal tags are extracted. The organization option changes labels, not the underlying metadata extraction; `-a` and `-u` are the parts that affect whether duplicate or unknown printed tags are included.
+
 ## Requirements
 
 - Python 3.10 or newer