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Lesson 6

Video Annotation for Tactical Analysis

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Hello and welcome to your sixth lesson. This is the final lesson in our first module, "Foundations & The Analyst's Toolkit."

In our last session, we learned how to tag match footage. You now understand how to turn a full 90-minute game into a structured database of specific events, like corner kicks or free kicks, using categories and descriptors. This allows you to instantly access all the relevant clips you need.

Today, we'll learn what to do with those clips. The learning outcome is to use annotation tools (e.g., telestration) to highlight tactical details in video clips. We're moving from collecting information to communicating it. This skill is how you transform a raw video clip into a powerful teaching tool that can clearly and concisely explain a tactical concept to a player or fellow coach.

What is Telestration?

Telestration is the process of drawing graphics, shapes, and text over video footage. You've seen it countless times on broadcasts like Match of the Day or Sky Sports' Monday Night Football. For a coach, it's an essential tool to eliminate ambiguity and direct a player's focus to exactly what you want them to see.

Instead of saying, "Watch how their defender gets drawn to the near post," you can show it, making your point instantly understood.

Here are a couple of examples of what a final, annotated image can look like:

Tactical Analysis with Telestration in Football
This annotation effectively shows multiple tactical elements at once: the intended ball trajectory (red dashed line), a player's planned run (blue dashed line), and the target zone for the attack (red hatched area).
Video Analysis Software with Tactical Annotations
This example shows a simpler analysis of a shot, but also gives you a glimpse of the software interface, with the drawing tools on the left and the annotation properties on the right.

The Core Annotation Tools

While software packages vary, they all share a common set of fundamental tools for highlighting players, spaces, and movements.

Making the most of the KlipDraw Animate tools - 'Talk to Brad' - Episode 4

To see these tools in action, let's watch a brief demonstration from the team at KlipDraw, a popular analysis software. This will give you a quick, clear overview of the most common annotation types.

Watch the segment from 00:52 to 02:38. Pay attention to the different tools used and think about how each one could be used to analyse a set piece: Arrows: To show player runs or the path of the ball. Spotlights/Donuts: To highlight a key player. Shapes (lines/polygons): To illustrate defensive structures or to highlight open space.

As you can see, a few simple tools can combine to tell a complex tactical story.

The Annotation Workflow

Now let's walk through the process of adding these annotations to a clip. In the previous lesson, you were introduced to Metrica Sports as an accessible platform for tagging. We'll continue with it here to see how you would move from your tagged clip to a fully annotated video.

The general workflow is:

  1. Open the clip you want to analyse.
  2. Calibrate the pitch so your drawings "stick" to the field as the camera moves.
  3. Select an annotation tool (e.g., arrow, circle).
  4. Draw the annotation on the video frame.
  5. Adjust the timing to control when the annotation appears and disappears.
  6. Export the final video.

Metrica PlayBase 2.13: Full Tutorial | Metrica Sports

This full tutorial for Metrica PlayBase contains sections that neatly demonstrate this workflow. We'll focus on the key steps for adding manual annotations.

Please watch the following segments: Accessing the Module (04:44 - 05:33): This shows how to open the annotation tools for a clip you've created. Calibrating the Pitch (05:33 - 06:45): Pay attention to how the analyst clicks on corner flags and line intersections. This step is what allows the software to track the pitch surface. Adding and Customising Annotations (06:45 - 07:49): This demonstrates how to manually track a player with a highlight and how to change its appearance (colour, size, etc.). Focus on understanding the process rather than memorising every button. The principles are transferable to any other analysis software you might use.

Principles of Effective Telestration

Knowing how to use the tools is one thing; knowing how to use them effectively is another. A cluttered, confusing analysis is worse than no analysis at all. Your goal is always clarity and impact.

Tutorial for my Tactical Analysis Methods

Jamie Scott's blog post 'Tutorial for my Tactical Analysis Methods' offers some excellent advice on this. He focuses on the mindset you need when creating analysis for others.

Please read 'Part Three: Telestration Methods'. The most important takeaway here is his advice: 'Bear in mind that what might be obvious to you is not obvious for your audience'. This is the golden rule of analysis.

Building on that golden rule, let's look at some specific tips that can elevate your analysis from amateur to professional. The difference is often in the small details that create a cleaner, more readable visual.

KlipDraw Tips for More Professional Telestration

The article 'KlipDraw Tips for More Professional Telestration' provides concrete, actionable advice for improving the quality of your annotations.

Read through the following tips in the article. They are short and have great visual examples: Tip #1: Use Spotlights and Bases Wisely: This shows how to highlight a player without visually 'cutting their feet off', a common mistake. Tip #4: Change the Perspective of Surfaces and Shapes: This is crucial. Making your shapes match the camera's perspective makes the graphic look like part of the world, not just something drawn on top. Tip #6: Pin the Zoom: This is a fantastic technique for showing a detailed interaction (like a block on a marker) without losing the bigger picture.

Test your understanding!

You are analysing an attacking corner. Your aim is to show how a decoy run from Player A pulls a key defender out of position, creating space for Player B to score with a header.

Which annotation tools would you use, and what principles from the resources would you apply to make your coaching point as clear as possible?

Show answer

Here is one effective approach:

  • Tools:

    • Use a curved arrow or the player mover tool to illustrate Player A's decoy run.
    • Use a spotlight or donut to highlight the key defender being pulled out of position.
    • Use a polygon/shape to fill in the area of space that is created by this movement.
    • Use another arrow to show Player B's run into that newly created space.
    • You could add a simple text box that says "Decoy" or "Space".

  • Principles:

    • Clarity over Clutter: Don't highlight every player. Only highlight Player A, the defender, and Player B. The other players are secondary to this specific point.
    • Timing: Ensure the annotations appear sequentially. First, show the decoy run. As the defender moves, show the space opening up. Finally, show Player B attacking that space.
    • Perspective: If you use a shape to highlight the space, adjust its perspective (using the X, Y, Z keys as mentioned in the KlipDraw article) to match the pitch. This makes it look much more professional.
    • Colour Coding: Use different colours to mean different things and be consistent. For example, your team's movements in green, the opponent's in red, and the target space in yellow.

Conclusion

This lesson concludes our foundational module on the analyst's toolkit. You've gone from understanding the statistical impact of set pieces to tagging footage and now, finally, to annotating that footage to communicate tactical ideas.

Key Takeaways:

  • Telestration is the use of graphical overlays on video to highlight tactical points and is a core skill for coaching.
  • The basic toolkit includes arrows for movement, spotlights for players, and shapes for zones or spaces.
  • Effective annotation is about clarity and communication. Remember the golden rule: what is obvious to you may not be obvious to your audience.
  • Professionalism in telestration comes from attention to detail, such as matching perspective, using a clean visual style, and timing your animations to tell a story.

Preview of Module 2:

You now have the fundamental analytical skills required to break down any phase of play. In our next module, we will apply these skills directly to the art and science of Corner Kick Strategy. We will begin by using your new analysis capabilities to examine one of the most fundamental decisions a coach has to make: the delivery. Our next lesson will be to compare the principles of inswing, outswing, short, and driven corner deliveries.