diff --git a/src/toM3u8.js b/src/toM3u8.js
index a5aeacc8..62498e02 100644
--- a/src/toM3u8.js
+++ b/src/toM3u8.js
@@ -245,9 +245,9 @@ export const toM3u8 = (dashPlaylists, sidxMapping = {}) => {
   } = dashPlaylists[0].attributes;
 
   const videoOnly = ({ attributes }) =>
-    attributes.mimeType === 'video/mp4' || attributes.contentType === 'video';
+    attributes.mimeType === 'video/mp4' || attributes.mimeType === 'video/webm' || attributes.contentType === 'video';
   const audioOnly = ({ attributes }) =>
-    attributes.mimeType === 'audio/mp4' || attributes.contentType === 'audio';
+    attributes.mimeType === 'audio/mp4' || attributes.mimeType === 'audio/webm' || attributes.contentType === 'audio';
   const vttOnly = ({ attributes }) =>
     attributes.mimeType === 'text/vtt' || attributes.contentType === 'text';
 
diff --git a/test/index.test.js b/test/index.test.js
index 8f03eb0e..30fbf675 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -6,6 +6,7 @@ import maatVttSegmentTemplate from './manifests/maat_vtt_segmentTemplate.mpd';
 import segmentBaseTemplate from './manifests/segmentBase.mpd';
 import segmentListTemplate from './manifests/segmentList.mpd';
 import multiperiod from './manifests/multiperiod.mpd';
+import webmsegments from './manifests/webmsegments.mpd';
 import multiperiodDynamic from './manifests/multiperiod-dynamic.mpd';
 import {
   parsedManifest as maatVttSegmentTemplateManifest
@@ -19,6 +20,9 @@ import {
 import {
   parsedManifest as multiperiodManifest
 } from './manifests/multiperiod.js';
+import {
+  parsedManifest as webmsegmentsManifest
+} from './manifests/webmsegments.js';
 import {
   parsedManifest as multiperiodDynamicManifest
 } from './manifests/multiperiod-dynamic.js';
@@ -49,6 +53,10 @@ QUnit.test('has parse', function(assert) {
   name: 'multiperiod',
   input: multiperiod,
   expected: multiperiodManifest
+}, {
+  name: 'webmsegments',
+  input: webmsegments,
+  expected: webmsegmentsManifest
 }, {
   name: 'multiperiod_dynamic',
   input: multiperiodDynamic,
diff --git a/test/manifests/webmsegments.js b/test/manifests/webmsegments.js
new file mode 100644
index 00000000..e8c3fee1
--- /dev/null
+++ b/test/manifests/webmsegments.js
@@ -0,0 +1,154 @@
+export const parsedManifest = {
+  allowCache: true,
+  discontinuityStarts: [],
+  segments: [],
+  endList: true,
+  mediaGroups: {
+    'AUDIO': {
+      audio: {
+        en: {
+          language: 'en',
+          autoselect: true,
+          default: true,
+          playlists: [
+            {
+              attributes: {
+                'NAME': '2',
+                'BANDWIDTH': 32000,
+                'CODECS': 'opus',
+                'PROGRAM-ID': 1
+              },
+              uri: '',
+              endList: true,
+              timeline: 1,
+              resolvedUri: '',
+              targetDuration: 4,
+              segments: [
+                {
+                  uri: 'audio/segment_0.chk',
+                  timeline: 1,
+                  duration: 4,
+                  resolvedUri: 'https://www.example.com/audio/segment_0.chk',
+                  map: {
+                    uri: 'audio/init.hdr',
+                    resolvedUri: 'https://www.example.com/audio/init.hdr'
+                  },
+                  number: 0
+                },
+                {
+                  uri: 'audio/segment_1.chk',
+                  timeline: 1,
+                  duration: 4,
+                  resolvedUri: 'https://www.example.com/audio/segment_1.chk',
+                  map: {
+                    uri: 'audio/init.hdr',
+                    resolvedUri: 'https://www.example.com/audio/init.hdr'
+                  },
+                  number: 1
+                },
+                {
+                  uri: 'audio/segment_2.chk',
+                  timeline: 1,
+                  duration: 4,
+                  resolvedUri: 'https://www.example.com/audio/segment_2.chk',
+                  map: {
+                    uri: 'audio/init.hdr',
+                    resolvedUri: 'https://www.example.com/audio/init.hdr'
+                  },
+                  number: 2
+                },
+                {
+                  uri: 'audio/segment_3.chk',
+                  timeline: 1,
+                  duration: 4,
+                  resolvedUri: 'https://www.example.com/audio/segment_3.chk',
+                  map: {
+                    uri: 'audio/init.hdr',
+                    resolvedUri: 'https://www.example.com/audio/init.hdr'
+                  },
+                  number: 3
+                }
+              ],
+              mediaSequence: 0
+            }
+          ],
+          uri: ''
+        }
+      }
+    },
+    'VIDEO': {},
+    'CLOSED-CAPTIONS': {},
+    'SUBTITLES': {}
+  },
+  uri: '',
+  duration: 16,
+  playlists: [
+    {
+      attributes: {
+        'NAME': '1',
+        'AUDIO': 'audio',
+        'SUBTITLES': 'subs',
+        'RESOLUTION': {
+          width: 480,
+          height: 200
+        },
+        'CODECS': 'av1',
+        'BANDWIDTH': 100000,
+        'PROGRAM-ID': 1
+      },
+      uri: '',
+      endList: true,
+      timeline: 1,
+      resolvedUri: '',
+      targetDuration: 4,
+      segments: [
+        {
+          uri: 'video/segment_0.chk',
+          timeline: 1,
+          duration: 4,
+          resolvedUri: 'https://www.example.com/video/segment_0.chk',
+          map: {
+            uri: 'video/init.hdr',
+            resolvedUri: 'https://www.example.com/video/init.hdr'
+          },
+          number: 0
+        },
+        {
+          uri: 'video/segment_1.chk',
+          timeline: 1,
+          duration: 4,
+          resolvedUri: 'https://www.example.com/video/segment_1.chk',
+          map: {
+            uri: 'video/init.hdr',
+            resolvedUri: 'https://www.example.com/video/init.hdr'
+          },
+          number: 1
+        },
+        {
+          uri: 'video/segment_2.chk',
+          timeline: 1,
+          duration: 4,
+          resolvedUri: 'https://www.example.com/video/segment_2.chk',
+          map: {
+            uri: 'video/init.hdr',
+            resolvedUri: 'https://www.example.com/video/init.hdr'
+          },
+          number: 2
+        },
+        {
+          uri: 'video/segment_3.chk',
+          timeline: 1,
+          duration: 4,
+          resolvedUri: 'https://www.example.com/video/segment_3.chk',
+          map: {
+            uri: 'video/init.hdr',
+            resolvedUri: 'https://www.example.com/video/init.hdr'
+          },
+          number: 3
+        }
+      ],
+      mediaSequence: 0
+    }
+  ],
+  minimumUpdatePeriod: 0
+};
diff --git a/test/manifests/webmsegments.mpd b/test/manifests/webmsegments.mpd
new file mode 100644
index 00000000..a2bae9c3
--- /dev/null
+++ b/test/manifests/webmsegments.mpd
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<MPD id="a467fa27-2820-41d1-89e2-a43216770daa" profiles="urn:mpeg:dash:profile:full:2011" type="static"
+ mediaPresentationDuration="P0Y0M0DT0H0M16S" minBufferTime="P0Y0M0DT0H0M2.000S"
+  xmlns="urn:mpeg:dash:schema:mpd:2011"  xmlns:ns2="http://www.w3.org/1999/xlink">
+    <Period id="1" start="P0Y0M0DT0H0M0.000S">
+        <BaseURL>https://www.example.com/base</BaseURL>
+        <AdaptationSet mimeType="video/webm">
+            <Representation id="1" bandwidth="100000" width="480" height="200" frameRate="24" codecs="av1">
+                <SegmentTemplate media="video/segment_$Number$.chk" initialization="video/init.hdr" duration="96000"
+                startNumber="0" timescale="24000"/>
+            </Representation>
+        </AdaptationSet>
+        <AdaptationSet lang="en" mimeType="audio/webm">
+            <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
+            <Representation id="2" bandwidth="32000" audioSamplingRate="48000" codecs="opus">
+                <SegmentTemplate media="audio/segment_$Number$.chk" initialization="audio/init.hdr" duration="192000"
+                 startNumber="0" timescale="48000"/>
+            </Representation>
+        </AdaptationSet>
+    </Period>
+</MPD>