When you load a video in Aegisub that is stored on an external drive and then disconnect it without closing Aegisub, and then play the video, it will fail to play and display an error dialog. The video can't be paused because the error dialog blocks interaction, and the error dialog will reappear when closed because the video is playing.
When you load a video in Aegisub that is stored on an external drive and then disconnect it without closing Aegisub, and then play the video, it will fail to play and display an error dialog. The video can't be paused because the error dialog blocks interaction, and the error dialog will reappear when closed because the video is playing.