diff --git a/src/numpydantic/interface/hdf5.py b/src/numpydantic/interface/hdf5.py
index 6bb7dda..0bb8720 100644
--- a/src/numpydantic/interface/hdf5.py
+++ b/src/numpydantic/interface/hdf5.py
@@ -194,10 +194,7 @@ class H5Interface(Interface):
     passthrough numpy-like interface to the dataset.
     """
 
-    input_types = (
-        H5ArrayPath,
-        H5Arraylike,
-    )
+    input_types = (H5ArrayPath, H5Arraylike, H5Proxy)
     return_type = H5Proxy
 
     @classmethod
@@ -211,7 +208,7 @@ class H5Interface(Interface):
         Check that the given array is a :class:`.H5ArrayPath` or something that
         resembles one.
         """
-        if isinstance(array, H5ArrayPath):
+        if isinstance(array, (H5ArrayPath, H5Proxy)):
             return True
 
         if isinstance(array, (tuple, list)) and len(array) in (2, 3):
@@ -242,6 +239,9 @@ class H5Interface(Interface):
         """Create an :class:`.H5Proxy` to use throughout validation"""
         if isinstance(array, H5ArrayPath):
             array = H5Proxy.from_h5array(h5array=array)
+        elif isinstance(array, H5Proxy):
+            # nothing to do, already proxied
+            pass
         elif isinstance(array, (tuple, list)) and len(array) == 2:  # pragma: no cover
             array = H5Proxy(file=array[0], path=array[1])
         elif isinstance(array, (tuple, list)) and len(array) == 3:
diff --git a/src/numpydantic/interface/video.py b/src/numpydantic/interface/video.py
index 0ac7c66..f64457b 100644
--- a/src/numpydantic/interface/video.py
+++ b/src/numpydantic/interface/video.py
@@ -190,7 +190,7 @@ class VideoInterface(Interface):
     OpenCV interface to treat videos as arrays.
     """
 
-    input_types = (str, Path, VideoCapture)
+    input_types = (str, Path, VideoCapture, VideoProxy)
     return_type = VideoProxy
 
     @classmethod
@@ -204,7 +204,9 @@ class VideoInterface(Interface):
         Check if array is a string or Path with a supported video extension,
         or an opened VideoCapture object
         """
-        if VideoCapture is not None and isinstance(array, VideoCapture):
+        if (VideoCapture is not None and isinstance(array, VideoCapture)) or isinstance(
+            array, VideoProxy
+        ):
             return True
 
         if isinstance(array, str):
@@ -220,6 +222,8 @@ class VideoInterface(Interface):
         """Get a :class:`.VideoProxy` object for this video"""
         if isinstance(array, VideoCapture):
             proxy = VideoProxy(video=array)
+        elif isinstance(array, VideoProxy):
+            proxy = array
         else:
             proxy = VideoProxy(path=array)
         return proxy
diff --git a/tests/test_interface/test_interface.py b/tests/test_interface/test_interface.py
index 1856578..ba69328 100644
--- a/tests/test_interface/test_interface.py
+++ b/tests/test_interface/test_interface.py
@@ -156,5 +156,7 @@ def test_interface_recursive(interfaces):
 def test_interface_revalidate(all_interfaces):
     """
     An interface should revalidate with the output of its initial validation
+
+    See: https://github.com/p2p-ld/numpydantic/pull/14
     """
     _ = type(all_interfaces)(array=all_interfaces.array)