get the end of an <object> video and add autoplay to it - html

Question

Two, maybe, simple questions:
1. I'm trying to get the end of my video with the function onended and don't works because I have an <object> like:
<object width="100%" height="100%" id="player_api" data="https://my-url.com" type="application/x-shockwave-flash"></object>
2. I have my params but If I add <param name="autoPlay" value="true"> and <param name="autoStart" value="true"> it doesn't autoplay anyway....
Thanks all.
EDIT:
This is my full object:
<object width="100%" height="100%" id="player_api" data="https://my-url.com" type="application/x-shockwave-flash">
<param name="allowscriptaccess" value="always">
<param name="quality" value="high">
<param name="bgcolor" value="#000000">
<param name="flashvars" value="config={"playlist":[{"url":"https://medialibrary-diretteweb-it.s3.amazonaws.com/advert/spot_crsa_40sec.mp4","autoPlay":false}],"clip":{"autoPlay":false},"plugins":{"controls":{"url":"https%3A//adserver.tigicongress.com/revive/www/delivery/fc.php%3Fscript%3DdeliveryLog%3AvastServeVideoPlayer%3Aplayer%26file_to_serve%3Dflowplayer/3.1.1/flowplayer.controls-3.1.1.swf"}},"playerId":"player"}">
<param name="autoPlay" value="true">
<param name="autoStart" value="true">
<param name="ShowControls" value="false">
</object>
EDIT 2: My second question I have figure out by myself, I'm still stuck at the first one.

Answer 1

<object onended="myFunction()" width="400" height="250" id="player_api" data="https://www.quirksmode.org/html5/videos/big_buck_bunny.mp4">
<param name="allowscriptaccess" value="always">
<param name="quality" value="high">
<param name="bgcolor" value="#000000">
<param name="autoplay" value="true">
<param name="ShowControls" value="true">
</object>