doc/iidxhook: Improve faq item video codec background video

Add some more information making it easier to identify the entry

doc/iidxhook/iidxhook1.md

@@ -198,6 +198,13 @@ can't be refreshed very often to make it feel unresponsive. Solution:
 hit your 10key/numpad slower than normal
 
 ## Background videos aren't working. When starting a song, windows is playing the error sound and a message box appears (RED, HAPPY SKY)
+If you are running in window mode, you can see an error pop-up window with the title
+`DirectShow Texture3D Sample` and error message
+`Could not create source filter to graph! hr=<some number>`.
+
+When running fullscreen, you only hear a windows error sound and the game appears to be frozen
+when trying to play a background video.
+
 You are missing a codec to decode and play the videos. There are different 
 methods available to get background videos working. Probably, the easiest 
 solution: grab the CLVSD.ax file and go to Start -> Run -> regsvr32 clvsd.ax
@@ -234,4 +241,4 @@ If one or multiple of these issues apply, use the built in scaling options by se
 *gfx.scale_back_buffer_width* and *gfx.scale_back_buffer_height* to a target resolution
 to scale to. Usually, you want to set this to the monitor's native resolution, e.g.
 1920x1080 for full HD. You can play around with a few different filters using
-*gfx.scale_back_buffer_filter* which impacts image quality/blurriness on upscaling.
+*gfx.scale_back_buffer_filter* which impacts image quality/blurriness on upscaling.

doc/iidxhook/iidxhook2.md

@@ -154,6 +154,13 @@ iidxhook can limit the frame rate for you (refer to help/config file)
 Use dxwnd and set settings like "Acquire admin caps" and "Fullscreen only"
 
 ## Background videos aren't working. When starting a song, windows is playing the error sound and a message box appears
+If you are running in window mode, you can see an error pop-up window with the title
+`DirectShow Texture3D Sample` and error message
+`Could not create source filter to graph! hr=<some number>`.
+
+When running fullscreen, you only hear a windows error sound and the game appears to be frozen
+when trying to play a background video.
+
 You are missing a codec to decode and play the videos. There are different 
 methods available to get background videos working. Probably, the easiest 
 solution: grab the CLVSD.ax file and go to Start -> Run -> regsvr32 clvsd.ax

doc/iidxhook/iidxhook3.md

@@ -165,6 +165,13 @@ iidxhook can limit the frame rate for you (refer to help/config file)
 Use dxwnd and set settings like "Acquire admin caps" and "Fullscreen only"
 
 ## Background videos aren't working. When starting a song, windows is playing the error sound and a message box appears
+If you are running in window mode, you can see an error pop-up window with the title
+`DirectShow Texture3D Sample` and error message
+`Could not create source filter to graph! hr=<some number>`.
+
+When running fullscreen, you only hear a windows error sound and the game appears to be frozen
+when trying to play a background video.
+
 You are missing a codec to decode and play the videos. There are different 
 methods available to get background videos working. Probably, the easiest 
 solution: grab the CLVSD.ax file and go to Start -> Run -> regsvr32 clvsd.ax

doc/iidxhook/iidxhook4.md

@@ -175,6 +175,13 @@ iidxhook can limit the frame rate for you (refer to help/config file)
 Use dxwnd and set settings like "Acquire admin caps" and "Fullscreen only"
 
 ## Background videos aren't working. When starting a song, windows is playing the error sound and a message box appears
+If you are running in window mode, you can see an error pop-up window with the title
+`DirectShow Texture3D Sample` and error message
+`Could not create source filter to graph! hr=<some number>`.
+
+When running fullscreen, you only hear a windows error sound and the game appears to be frozen
+when trying to play a background video.
+
 You are missing a codec to decode and play the videos. There are different 
 methods available to get background videos working. Probably, the easiest 
 solution: grab the CLVSD.ax file and go to Start -> Run -> regsvr32 clvsd.ax

doc/iidxhook/iidxhook5.md

@@ -171,6 +171,13 @@ iidxhook can limit the frame rate for you (refer to help/config file)
 Use dxwnd and set settings like "Acquire admin caps" and "Fullscreen only"
 
 ## Background videos aren't working. When starting a song, windows is playing the error sound and a message box appears
+If you are running in window mode, you can see an error pop-up window with the title
+`DirectShow Texture3D Sample` and error message
+`Could not create source filter to graph! hr=<some number>`.
+
+When running fullscreen, you only hear a windows error sound and the game appears to be frozen
+when trying to play a background video.
+
 You are missing a codec to decode and play the videos. There are different 
 methods available to get background videos working. Probably, the easiest 
 solution: grab the CLVSD.ax file and go to Start -> Run -> regsvr32 clvsd.ax

doc/iidxhook/iidxhook6.md

@@ -177,6 +177,13 @@ iidxhook can limit the frame rate for you (refer to help/config file)
 Use dxwnd and set settings like "Acquire admin caps" and "Fullscreen only"
 
 ## Background videos aren't working. When starting a song, windows is playing the error sound and a message box appears
+If you are running in window mode, you can see an error pop-up window with the title
+`DirectShow Texture3D Sample` and error message
+`Could not create source filter to graph! hr=<some number>`.
+
+When running fullscreen, you only hear a windows error sound and the game appears to be frozen
+when trying to play a background video.
+
 You are missing a codec to decode and play the videos. There are different 
 methods available to get background videos working. Probably, the easiest 
 solution: grab the CLVSD.ax file and go to Start -> Run -> regsvr32 clvsd.ax

doc/iidxhook/iidxhook7.md

@@ -182,6 +182,13 @@ iidxhook can limit the frame rate for you (refer to help/config file)
 Use dxwnd and set settings like "Acquire admin caps" and "Fullscreen only"
 
 ## Background videos aren't working. When starting a song, windows is playing the error sound and a message box appears
+If you are running in window mode, you can see an error pop-up window with the title
+`DirectShow Texture3D Sample` and error message
+`Could not create source filter to graph! hr=<some number>`.
+
+When running fullscreen, you only hear a windows error sound and the game appears to be frozen
+when trying to play a background video.
+
 You are missing a codec to decode and play the videos. There are different 
 methods available to get background videos working. Probably, the easiest 
 solution: grab the CLVSD.ax file and go to Start -> Run -> regsvr32 clvsd.ax

doc/iidxhook/iidxhook8.md

@@ -185,6 +185,13 @@ iidxhook can limit the frame rate for you (refer to help/config file)
 Use dxwnd and set settings like "Acquire admin caps" and "Fullscreen only"
 
 ## Background videos aren't working. When starting a song, windows is playing the error sound and a message box appears
+If you are running in window mode, you can see an error pop-up window with the title
+`DirectShow Texture3D Sample` and error message
+`Could not create source filter to graph! hr=<some number>`.
+
+When running fullscreen, you only hear a windows error sound and the game appears to be frozen
+when trying to play a background video.
+
 You are missing a codec to decode and play the videos. There are different 
 methods available to get background videos working. Probably, the easiest 
 solution: grab the CLVSD.ax file and go to Start -> Run -> regsvr32 clvsd.ax

doc/iidxhook/iidxhook9.md

@@ -221,6 +221,13 @@ iidxhook can limit the frame rate for you (refer to help/config file)
 Use dxwnd and set settings like "Acquire admin caps" and "Fullscreen only"
 
 ## Background videos aren't working. When starting a song, windows is playing the error sound and a message box appears
+If you are running in window mode, you can see an error pop-up window with the title
+`DirectShow Texture3D Sample` and error message
+`Could not create source filter to graph! hr=<some number>`.
+
+When running fullscreen, you only hear a windows error sound and the game appears to be frozen
+when trying to play a background video.
+
 You are missing a codec to decode and play the videos. There are different 
 methods available to get background videos working. Probably, the easiest 
 solution: grab the CLVSD.ax file and go to Start -> Run -> regsvr32 clvsd.ax