Minor annoyance. Removing this attribute corrects the error and doesn't seem to create any issues.
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at videoplayer/isemptybitmap()
at videoplayer/enterFrameHandler()
Code
<hotspot
name="videoplayer_a"
url="%SWFPATH%/plugins/videoplayer.swf"
alturl="%SWFPATH%/plugins/videoplayer.js"
atv="11.72"
ath="39.59"
scale=".08"
buffertime="3"
distorted="true"
capture="false"
directionalsound="true"
posterurl="%SWFPATH%/skin/poster.png"
videourl="video.flv"
onclick="togglepause();" align="center" keep="true" alpha="0" autoalpha="true" visible="false" handcursor="true" pausedonstart="true"
onvideocomplete="stop();tween(hotspot[videoplayer_a].alpha,0);tween(plugin[overlay].alpha,0);tween(hotspot[videoplayer_play_a].alpha,1);"
/>