Why can't I use the drawing tool while recording on a video

Summary

When you try to use the drawing tool while recording a YouTube video or some other video stream the video in the background stops playing. 

Solution

Why this happens:

Chromium-based browsers for Window devices have a feature called Native Window Occlusion that stops rendering objects on a web page if it detects that something is covering a page. When you use the drawing tool, Loom renders a full-screen transparent window on top of everything so that you can draw on it. As a result of this, videos stop playing in the background when the drawing tool is initiated. 

Here's how to fix this:

1. Visit chrome://flags/#temporary-unexpire-flags-m130

2. Navigate to Temporarily unexpire M130 flags and enable it.

3. Then click Relaunch

4. Visit chrome://flags/#calculate-native-win-occlusion .

5. Navigate to Calculate window occlusion for Windows and disable it.