diff --git a/Sources/MuxUploadSDK/Upload/ChunkedFileUploader.swift b/Sources/MuxUploadSDK/Upload/ChunkedFileUploader.swift
index 44c471dd..05019487 100644
--- a/Sources/MuxUploadSDK/Upload/ChunkedFileUploader.swift
+++ b/Sources/MuxUploadSDK/Upload/ChunkedFileUploader.swift
@@ -22,7 +22,7 @@ class ChunkedFileUploader {
     private var _currentState: InternalUploadState = .ready
     private var overallProgress: Progress = Progress()
     private var lastSeenUpdate: InternalUploadState? = nil
-    private var lastByte: UInt64 = 0
+    private var lastReadCount: UInt64 = 0
     
     func addDelegate(withToken token: Int, _ delegate: ChunkedFileUploaderDelegate) {
         delegates.updateValue(delegate, forKey: token)
@@ -87,8 +87,6 @@ class ChunkedFileUploader {
         let task = Task.detached { [self] in
             do {
                 // It's fine if it's already open, that's handled by ignoring the call
-                try file.openFile(fileURL: uploadInfo.videoFile)
-                try file.seekTo(byte: lastByte)
                 let result = try await makeWorker().performUpload()
                 file.close()
                 
@@ -103,14 +101,14 @@ class ChunkedFileUploader {
                 if let lastUpdate = lastSeenUpdate {
                     switch lastUpdate {
                     case .uploading(let update): do {
-                        if lastByte > 0 {
-                            lastByte = UInt64(update.progress.completedUnitCount)
+                        if lastReadCount > 0 {
+                            lastReadCount = UInt64(update.progress.completedUnitCount)
                         }
                     }
                     default: break
                     }
                 }
-                let uploadError = InternalUploaderError(reason: error, lastByte: lastByte)
+                let uploadError = InternalUploaderError(reason: error, lastByte: lastReadCount)
                 notifyStateFromWorker(.failure(uploadError))
             }
             
@@ -122,7 +120,8 @@ class ChunkedFileUploader {
         return Worker(
             uploadInfo: uploadInfo,
             chunkedFile: file,
-            progress: overallProgress
+            progress: overallProgress,
+            startByte: lastReadCount
         ) { progress, startTime, eventTime in
             let update = Update(
                 progress: progress,
@@ -149,7 +148,7 @@ class ChunkedFileUploader {
         
         if case .uploading(let update) = state {
             let count = update.progress.completedUnitCount
-            lastByte = UInt64(count)
+            lastReadCount = UInt64(count)
         }
         
         for delegate in delegates.values {
@@ -175,7 +174,7 @@ class ChunkedFileUploader {
     init(uploadInfo: UploadInfo, file: ChunkedFile, startingByte: UInt64 = 0) {
         self.uploadInfo = uploadInfo
         self.file = file
-        self.lastByte = startingByte
+        self.lastReadCount = startingByte
     }
     
     enum InternalUploadState {
@@ -214,14 +213,19 @@ fileprivate actor Worker {
     private let chunkedFile: ChunkedFile
     private let overallProgress: Progress
     private let progressHandler: ProgressHandler
+    private let startingReadCount: UInt64
     
     func performUpload() async throws -> ChunkedFileUploader.Update {
+        try chunkedFile.openFile(fileURL: uploadInfo.videoFile)
+        try chunkedFile.seekTo(byte: startingReadCount)
+        
         let startTime = Date().timeIntervalSince1970
         
         let fileSize = chunkedFile.fileSize
         let wideFileSize = Int64(fileSize)
         overallProgress.totalUnitCount = wideFileSize
         overallProgress.isCancellable = false
+        overallProgress.completedUnitCount = Int64(startingReadCount)
         
         var readBytes: Int
         repeat {
@@ -272,11 +276,13 @@ fileprivate actor Worker {
         uploadInfo: UploadInfo,
         chunkedFile: ChunkedFile,
         progress: Progress,
+        startByte: UInt64,
         _ progressHandler: @escaping ProgressHandler
     ) {
         self.uploadInfo = uploadInfo
         self.chunkedFile = chunkedFile
         self.progressHandler = progressHandler
         self.overallProgress = progress
+        self.startingReadCount = startByte
     }
 }
diff --git a/apps/Test App/Test App/Screens/UploadScreenViewModel.swift b/apps/Test App/Test App/Screens/UploadScreenViewModel.swift
index de7b4aa2..bca7a141 100644
--- a/apps/Test App/Test App/Screens/UploadScreenViewModel.swift	
+++ b/apps/Test App/Test App/Screens/UploadScreenViewModel.swift	
@@ -30,7 +30,7 @@ class UploadScreenViewModel: ObservableObject {
 
     }
     
-    let PUT_URL = "https://storage.googleapis.com/video-storage-gcp-us-east4-vop1-uploads/KmgByhv1MfRPismF8kPK3G?Expires=1678317874&GoogleAccessId=uploads-gcp-us-east1-vop1%40mux-video-production.iam.gserviceaccount.com&Signature=L%2BrmPZ2LW%2FOHrvXops0V%2Bp8AYuGRV3CkLywUl5lNdhWTQe3Iz85WXnDCLmAWnTNmiGVx3RWtAf5zRJ0Ahgcaz7hkq7kPpvUgx2NRzLukSeRix9CHowcshgqI8eQEtSx7HKxD8E2%2Boh0ur7tldNDCjBoTofg7yEzSu%2F2pqPp3qySf3nnjdbI86miKmLEK7d1YO431L3Ai5N6axWA9pR78cgrq7X48%2FqhDHmITtqRwx%2Baossr2Jar9FRY2PLFIHFawnyKbYGfmGHwDIR%2FCaqOFTUlnSKpbFJ5BZPGCu2HQVZbhuBSrWthg34hczlFT0K5410MMksyLXn8j0LC%2B757cQw%3D%3D&upload_id=ADPycdv6m_6zr0XH6-0w2EdY2wZzspZ1ofLu-2l9e64ni24k-FX66g31mkyHcawdRv5ITVksYpwJUU6VKblDkq143jKR"
+    let PUT_URL = "https://storage.googleapis.com/video-storage-gcp-us-east4-vop1-uploads/4OAV5fGb8RMf2ElvbeLz8I?Expires=1680807117&GoogleAccessId=uploads-gcp-us-east1-vop1%40mux-video-production.iam.gserviceaccount.com&Signature=dOFesy7mXnbKnytmdDsFKCVVZ6lW12JvPsTPOxSn0egin4WD6hVOQpTAmc3XycR%2F7OkoYKnTV6wauec9mrjLkOF4fdGuHUC76YZTMhezUFxNZYkEkf7rniRRUuiuJp%2B5IZvCdkYX0VfNMUDHG1pzi8XvEVN1evLI6CoA%2F6OPUJOtMC%2BX%2FTLlHUvFVzwPk06CzzjYer7ZE3O72UMtXFEAs4QAsf0L3eTfWJav4si%2F6F1Y3BgO4ypG7zKmStxsvQNa%2F71DlIwxo%2BO0n2iJFfh48te9kvI%2B7cqsgb7aaQcLIotJ040Jps5mRDlC5Q35yRIWhxRNmCfSLRnLUB1104SNwQ%3D%3D&upload_id=ADPycdu7bDavvtbJw3M9ukiH30zs06Ql-Twu7EHWfSKb48kvXU6Xd2Zn4EgBteTLwE3A0KrQEGg2H7p9rRKUX9D_Kt7OU_DHcGl4"
     
     @Published
     var uploadScreenState: AppUploadState = .not_started
@@ -128,12 +128,12 @@ class UploadScreenViewModel: ObservableObject {
         session.exportAsynchronously {
             DispatchQueue.main.async {
                 NSLog("Yay, Media exported & ready for upload!")
-                self.beginMuxUpload(videoFile: outFile)
+                self.beginUploadToMux(videoFile: outFile)
             }
         }
     }
     
-    private func beginMuxUpload(videoFile: URL) {
+    private func beginUploadToMux(videoFile: URL) {
         let upload = MuxUpload(
             uploadURL: URL(string: PUT_URL)!,
             videoFileURL: videoFile,