diff --git a/.env.defaults b/.env.defaults
index 71004f69e..ac65b6a58 100644
--- a/.env.defaults
+++ b/.env.defaults
@@ -8,6 +8,7 @@ WEBPACK_ELECTRON_PORT=9091
 WEB_SERVER_PORT=1337
 LBRY_WEB_API=https://api.lbry.tv
 LBRY_WEB_STREAMING_API=https://cdn.lbryplayer.xyz
+LBRY_WEB_BUFFER_API=https://collector-service.api.lbry.tv/api/v1/events/video
 WELCOME_VERSION=1.0
 
 # Custom Site info
diff --git a/config.js b/config.js
index 517b7af08..b35cda7f8 100644
--- a/config.js
+++ b/config.js
@@ -9,6 +9,7 @@ const config = {
   WEB_SERVER_PORT: process.env.WEB_SERVER_PORT,
   LBRY_WEB_API: process.env.LBRY_WEB_API, //api.lbry.tv',
   LBRY_WEB_STREAMING_API: process.env.LBRY_WEB_STREAMING_API, //cdn.lbryplayer.xyz',
+  LBRY_WEB_BUFFER_API: process.env.LBRY_WEB_BUFFER_API,
   WELCOME_VERSION: process.env.WELCOME_VERSION,
   DOMAIN: process.env.DOMAIN,
   URL: process.env.URL,
diff --git a/ui/analytics.js b/ui/analytics.js
index f5c9630ae..a9bea13fd 100644
--- a/ui/analytics.js
+++ b/ui/analytics.js
@@ -9,7 +9,7 @@ import Native from 'native';
 import ElectronCookies from '@exponent/electron-cookies';
 import { generateInitialUrl } from 'util/url';
 // @endif
-import { MATOMO_ID, MATOMO_URL } from 'config';
+import { MATOMO_ID, MATOMO_URL, LBRY_WEB_BUFFER_API } from 'config';
 
 const isProduction = process.env.NODE_ENV === 'production';
 const devInternalApis = process.env.LBRY_API_URL;
@@ -36,7 +36,10 @@ type Analytics = {
   apiSyncTags: ({}) => void,
   tagFollowEvent: (string, boolean, ?string) => void,
   videoStartEvent: (string, number) => void,
-  videoBufferEvent: (string, number) => void,
+  videoBufferEvent: (
+    StreamClaim,
+    { timeAtBuffer: number, bufferDuration: number, bitRate: number, duration: number, userIdHash: string }
+  ) => void,
   emailProvidedEvent: () => void,
   emailVerifiedEvent: () => void,
   rewardEligibleEvent: () => void,
@@ -182,9 +185,32 @@ const analytics: Analytics = {
     sendPromMetric('time_to_start', duration);
     sendMatomoEvent('Media', 'TimeToStart', claimId, duration);
   },
-  videoBufferEvent: (claimId, currentTime) => {
+  videoBufferEvent: (claim, data) => {
+    // @if TARGET='web'
     sendPromMetric('buffer');
-    sendMatomoEvent('Media', 'BufferTimestamp', claimId, currentTime * 1000);
+    // @endif
+
+    sendMatomoEvent('Media', 'BufferTimestamp', claim.claim_id, data.timeAtBuffer);
+
+    fetch(LBRY_WEB_BUFFER_API, {
+      method: 'post',
+      headers: {
+        Accept: 'application/json',
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({
+        device: 'web',
+        type: 'buffering',
+        client: data.userIdHash,
+        data: {
+          url: claim.canonical_url,
+          position: data.timeAtBuffer,
+          duration: data.bufferDuration,
+          stream_duration: data.duration,
+          stream_bitrate: data.bitRate,
+        },
+      }),
+    });
   },
   tagFollowEvent: (tag, following) => {
     sendMatomoEvent('Tag', following ? 'Tag-Follow' : 'Tag-Unfollow', tag);
diff --git a/ui/component/fileDetails/view.jsx b/ui/component/fileDetails/view.jsx
index 0fd86cab3..ec0f00722 100644
--- a/ui/component/fileDetails/view.jsx
+++ b/ui/component/fileDetails/view.jsx
@@ -3,6 +3,7 @@ import React, { Fragment, PureComponent } from 'react';
 import Button from 'component/button';
 import path from 'path';
 import Card from 'component/common/card';
+import { formatBytes } from 'util/format-bytes';
 
 type Props = {
   claim: StreamClaim,
@@ -102,17 +103,5 @@ class FileDetails extends PureComponent<Props> {
     );
   }
 }
-// move this with other helper functions when we re-use it
-function formatBytes(bytes, decimals = 2) {
-  if (bytes === 0) return __('0 Bytes');
-
-  const k = 1024;
-  const dm = decimals < 0 ? 0 : decimals;
-  const sizes = [__('Bytes'), __('KB'), __('MB'), __('GB'), __('TB'), __('PB'), __('EB'), __('ZB'), __('YB')];
-
-  const i = Math.floor(Math.log(bytes) / Math.log(k));
-
-  return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
-}
 
 export default FileDetails;
diff --git a/ui/component/viewers/videoViewer/index.js b/ui/component/viewers/videoViewer/index.js
index 69718d9a9..d1bcb8c75 100644
--- a/ui/component/viewers/videoViewer/index.js
+++ b/ui/component/viewers/videoViewer/index.js
@@ -1,6 +1,6 @@
 import { connect } from 'react-redux';
 import { makeSelectClaimForUri, makeSelectFileInfoForUri, makeSelectThumbnailForUri, SETTINGS } from 'lbry-redux';
-import { doChangeVolume, doChangeMute, doAnalyticsView } from 'redux/actions/app';
+import { doChangeVolume, doChangeMute, doAnalyticsView, doAnalyticsBuffer } from 'redux/actions/app';
 import { selectVolume, selectMute } from 'redux/selectors/app';
 import { savePosition, clearPosition } from 'redux/actions/content';
 import { makeSelectContentPositionForUri } from 'redux/selectors/content';
@@ -33,6 +33,7 @@ const perform = dispatch => ({
   clearPosition: uri => dispatch(clearPosition(uri)),
   changeMute: muted => dispatch(doChangeMute(muted)),
   doAnalyticsView: (uri, timeToStart) => dispatch(doAnalyticsView(uri, timeToStart)),
+  doAnalyticsBuffer: (uri, bufferData) => dispatch(doAnalyticsBuffer(uri, bufferData)),
   claimRewards: () => dispatch(doClaimEligiblePurchaseRewards()),
 });
 
diff --git a/ui/component/viewers/videoViewer/view.jsx b/ui/component/viewers/videoViewer/view.jsx
index 10a172eff..5a3c4b15d 100644
--- a/ui/component/viewers/videoViewer/view.jsx
+++ b/ui/component/viewers/videoViewer/view.jsx
@@ -23,7 +23,7 @@ type Props = {
   source: string,
   contentType: string,
   thumbnail: string,
-  claim: Claim,
+  claim: StreamClaim,
   muted: boolean,
   volume: number,
   uri: string,
@@ -31,6 +31,7 @@ type Props = {
   autoplayIfEmbedded: boolean,
   desktopPlayStartTime?: number,
   doAnalyticsView: (string, number) => Promise<any>,
+  doAnalyticsBuffer: (string, any) => void,
   claimRewards: () => void,
   savePosition: (string, number) => void,
   clearPosition: string => void,
@@ -56,6 +57,7 @@ function VideoViewer(props: Props) {
     autoplaySetting,
     autoplayIfEmbedded,
     doAnalyticsView,
+    doAnalyticsBuffer,
     claimRewards,
     savePosition,
     clearPosition,
@@ -85,7 +87,7 @@ function VideoViewer(props: Props) {
   }, [uri, previousUri]);
 
   function doTrackingBuffered(e: Event, data: any) {
-    analytics.videoBufferEvent(claimId, data.currentTime);
+    doAnalyticsBuffer(uri, data);
   }
 
   function doTrackingFirstPlay(e: Event, data: any) {
diff --git a/ui/redux/actions/app.js b/ui/redux/actions/app.js
index 9941ae406..84aaf0cbf 100644
--- a/ui/redux/actions/app.js
+++ b/ui/redux/actions/app.js
@@ -53,6 +53,8 @@ import analytics, { SHARE_INTERNAL } from 'analytics';
 import { doSignOutCleanup, deleteSavedPassword, getSavedPassword } from 'util/saved-passwords';
 import { doSocketConnect } from 'redux/actions/websocket';
 import { stringifyServerParam, shouldSetSetting } from 'util/sync-settings';
+import sha256 from 'crypto-js/sha256';
+import Base64 from 'crypto-js/enc-base64';
 
 // @if TARGET='app'
 const { autoUpdater } = remote.require('electron-updater');
@@ -467,6 +469,32 @@ export function doAnalyticsView(uri, timeToStart) {
   };
 }
 
+export function doAnalyticsBuffer(uri, bufferData) {
+  return (dispatch, getState) => {
+    const state = getState();
+    const claim = makeSelectClaimForUri(uri)(state);
+    const user = selectUser(state);
+    const {
+      value: { video, audio, source },
+    } = claim;
+    const timeAtBuffer = bufferData.currentTime * 1000;
+    const bufferDuration = bufferData.secondsToLoad * 1000;
+    const fileDurationInSeconds = (video && video.duration) || (audio && audio.duration);
+    const fileSize = source.size; // size in bytes
+    const fileSizeInBits = fileSize * 8;
+    const bitRate = parseInt(fileSizeInBits / fileDurationInSeconds);
+    const userIdHash = Base64.stringify(sha256(user.id));
+
+    analytics.videoBufferEvent(claim, {
+      timeAtBuffer,
+      bufferDuration,
+      bitRate,
+      userIdHash,
+      duration: fileDurationInSeconds,
+    });
+  };
+}
+
 export function doAnalyticsTagSync() {
   return (dispatch, getState) => {
     const state = getState();
@@ -560,11 +588,12 @@ export function doGetAndPopulatePreferences() {
 
   return (dispatch, getState) => {
     const state = getState();
+    let preferenceKey;
     // @if TARGET='app'
-    const preferenceKey = state.user && state.user.user && state.user.user.has_verified_email ? 'shared' : 'anon';
+    preferenceKey = state.user && state.user.user && state.user.user.has_verified_email ? 'shared' : 'anon';
     // @endif
     // @if TARGET='web'
-    const preferenceKey = 'shared';
+    preferenceKey = 'shared';
     // @endif
 
     function successCb(savedPreferences) {
diff --git a/ui/util/format-bytes.js b/ui/util/format-bytes.js
new file mode 100644
index 000000000..247d8f424
--- /dev/null
+++ b/ui/util/format-bytes.js
@@ -0,0 +1,12 @@
+// @flow
+export function formatBytes(bytes: number, decimals?: number = 2) {
+  if (bytes === 0) return __('0 Bytes');
+
+  const k = 1024;
+  const dm = decimals < 0 ? 0 : decimals;
+  const sizes = [__('Bytes'), __('KB'), __('MB'), __('GB'), __('TB'), __('PB'), __('EB'), __('ZB'), __('YB')];
+
+  const i = Math.floor(Math.log(bytes) / Math.log(k));
+
+  return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
+}