HLS adjustments (#20983)

* Revert "Fix HLS jumping to end of timeChunk (#20982)"

This reverts commit 301e0a1a3a.

* Never use native HLS

* Fix inverse operation

web/src/components/player/dynamic/DynamicVideoPlayer.tsx

@@ -111,6 +111,7 @@ export default function DynamicVideoPlayer({
   const [loadingTimeout, setLoadingTimeout] = useState<NodeJS.Timeout>();
   const [source, setSource] = useState<HlsSource>({
     playlist: `${apiHost}vod/${camera}/start/${timeRange.after}/end/${timeRange.before}/master.m3u8`,
+    startPosition: startTimestamp ? startTimestamp - timeRange.after : 0,
   });
 
   // start at correct time
@@ -195,8 +196,26 @@ export default function DynamicVideoPlayer({
       playerRef.current.autoplay = !isScrubbing;
     }
 
+    let startPosition = undefined;
+
+    if (startTimestamp) {
+      const inpointOffset = calculateInpointOffset(
+        recordingParams.after,
+        (recordings || [])[0],
+      );
+      const idealStartPosition = Math.max(
+        0,
+        startTimestamp - timeRange.after - inpointOffset,
+      );
+
+      if (idealStartPosition >= recordings[0].start_time - timeRange.after) {
+        startPosition = idealStartPosition;
+      }
+    }
+
     setSource({
       playlist: `${apiHost}vod/${camera}/start/${recordingParams.after}/end/${recordingParams.before}/master.m3u8`,
+      startPosition,
     });
 
     setLoadingTimeout(setTimeout(() => setIsLoading(true), 1000));