diff --git a/BizHawk.Client.Common/movie/interfaces/IMovie.cs b/BizHawk.Client.Common/movie/interfaces/IMovie.cs
index fe1f64190e..a3813c75ee 100644
--- a/BizHawk.Client.Common/movie/interfaces/IMovie.cs
+++ b/BizHawk.Client.Common/movie/interfaces/IMovie.cs
@@ -246,11 +246,11 @@ namespace BizHawk.Client.Common
 
 	public static class MovieExtensions
 	{
-		public static bool IsActive(this IMovie movie) => movie.Mode != MovieMode.Inactive;
-		public static bool NotActive(this IMovie movie) => movie.Mode == MovieMode.Inactive;
-		public static bool IsPlaying(this IMovie movie) => movie.Mode == MovieMode.Play || movie.Mode == MovieMode.Finished;
-		public static bool IsRecording(this IMovie movie) => movie.Mode == MovieMode.Record;
+		public static bool IsActive(this IMovie movie) => movie?.Mode != MovieMode.Inactive;
+		public static bool NotActive(this IMovie movie) => movie == null || movie.Mode == MovieMode.Inactive;
+		public static bool IsPlaying(this IMovie movie) => movie?.Mode == MovieMode.Play || movie?.Mode == MovieMode.Finished;
+		public static bool IsRecording(this IMovie movie) => movie?.Mode == MovieMode.Record;
 		public static bool IsFinished(this IMovie movie) => movie.Mode == MovieMode.Finished;
-		public static bool IsPlayingOrRecording(this IMovie movie) => movie.Mode == MovieMode.Play && movie.Mode == MovieMode.Record;
+		public static bool IsPlayingOrRecording(this IMovie movie) => movie?.Mode == MovieMode.Play && movie.Mode == MovieMode.Record;
 	}
 }
diff --git a/BizHawk.Client.EmuHawk/tools/TAStudio/BookmarksBranchesBox.cs b/BizHawk.Client.EmuHawk/tools/TAStudio/BookmarksBranchesBox.cs
index 884859aa53..dc8a37e518 100644
--- a/BizHawk.Client.EmuHawk/tools/TAStudio/BookmarksBranchesBox.cs
+++ b/BizHawk.Client.EmuHawk/tools/TAStudio/BookmarksBranchesBox.cs
@@ -19,7 +19,7 @@ namespace BizHawk.Client.EmuHawk
 		private readonly ScreenshotForm _screenshot = new ScreenshotForm();
 
 		private TasMovie Movie => Tastudio.CurrentTasMovie;
-		private MainForm MainForm => GlobalWin.MainForm; // TODO: pass this in
+		private MainForm MainForm => Tastudio.MainForm;
 		private TasBranch _backupBranch;
 		private BranchUndo _branchUndo = BranchUndo.None;
 
diff --git a/BizHawk.Client.EmuHawk/tools/TAStudio/PlaybackBox.cs b/BizHawk.Client.EmuHawk/tools/TAStudio/PlaybackBox.cs
index acd7cd3164..f32e89208c 100644
--- a/BizHawk.Client.EmuHawk/tools/TAStudio/PlaybackBox.cs
+++ b/BizHawk.Client.EmuHawk/tools/TAStudio/PlaybackBox.cs
@@ -16,7 +16,7 @@ namespace BizHawk.Client.EmuHawk
 		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 		public bool TurboSeek
 		{
-			get => Global.Config.TurboSeek;
+			get => Tastudio.Config.TurboSeek;
 			set => TurboSeekCheckbox.Checked = value;
 		}
 
@@ -40,21 +40,21 @@ namespace BizHawk.Client.EmuHawk
 		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 		public bool RecordingMode
 		{
-			get => Global.MovieSession.Movie.IsRecording();
+			get => Tastudio.CurrentTasMovie.IsRecording();
 			set
 			{
 				RecordingModeCheckbox.Checked = value;
 				Global.MovieSession.ReadOnly = !value;
 				if (RecordingModeCheckbox.Checked)
 				{
-					Global.MovieSession.Movie.SwitchToRecord();
+					Tastudio.CurrentTasMovie.SwitchToRecord();
 				}
 				else
 				{
-					Global.MovieSession.Movie.SwitchToPlay();
+					Tastudio.CurrentTasMovie.SwitchToPlay();
 				}
 
-				GlobalWin.MainForm.SetMainformMovieInfo();
+				Tastudio.MainForm.SetMainformMovieInfo();
 			}
 		}
 
@@ -67,13 +67,9 @@ namespace BizHawk.Client.EmuHawk
 		{
 			base.OnLoad(e);
 
-			if (Global.Config != null) // For the designer
-			{
-				TurboSeekCheckbox.Checked = Global.Config.TurboSeek;
-			}
-
 			if (Tastudio != null) // For the designer
 			{
+				TurboSeekCheckbox.Checked = Tastudio.Config?.TurboSeek ?? false;
 				AutoRestoreCheckbox.Checked = Tastudio.Settings.AutoRestoreLastPosition;
 				FollowCursorCheckbox.Checked = Tastudio.Settings.FollowCursor;
 				RecordingModeCheckbox.Checked = RecordingMode;
@@ -101,7 +97,7 @@ namespace BizHawk.Client.EmuHawk
 		{
 			if (!_loading)
 			{
-				Global.Config.TurboSeek ^= true;
+				Tastudio.Config.TurboSeek ^= true;
 			}
 		}
 
@@ -135,32 +131,32 @@ namespace BizHawk.Client.EmuHawk
 
 		private void RewindButton_MouseDown(object sender, MouseEventArgs e)
 		{
-			GlobalWin.MainForm.PressRewind = true;
+			Tastudio.MainForm.PressRewind = true;
 		}
 
 		private void RewindButton_MouseUp(object sender, MouseEventArgs e)
 		{
-			GlobalWin.MainForm.PressRewind = false;
+			Tastudio.MainForm.PressRewind = false;
 		}
 
 		private void RewindButton_MouseLeave(object sender, EventArgs e)
 		{
-			GlobalWin.MainForm.PressRewind = false;
+			Tastudio.MainForm.PressRewind = false;
 		}
 
 		private void FrameAdvanceButton_MouseDown(object sender, MouseEventArgs e)
 		{
-			GlobalWin.MainForm.HoldFrameAdvance = true;
+			Tastudio.MainForm.HoldFrameAdvance = true;
 		}
 
 		private void FrameAdvanceButton_MouseLeave(object sender, EventArgs e)
 		{
-			GlobalWin.MainForm.HoldFrameAdvance = false;
+			Tastudio.MainForm.HoldFrameAdvance = false;
 		}
 
 		private void FrameAdvanceButton_MouseUp(object sender, MouseEventArgs e)
 		{
-			GlobalWin.MainForm.HoldFrameAdvance = false;
+			Tastudio.MainForm.HoldFrameAdvance = false;
 		}
 	}
 }