Twitter Player card not working properly


I am trying to share video from my webpage to twitter using twitter meta player card.
which is as below.

<meta name="twitter:card" content="player">
<meta name="twitter:site" content="@mywebsite">
<meta name="twitter:creator" content="@test">
<meta name="twitter:title" content="test">
<meta name="twitter:description" content="test">
<meta name="twitter:player" content="" />
<meta name="twitter:player:width" content="100%" />
<meta name="twitter:player:height" content="100%" />
<meta name="twitter:image" content="">

and the video file is as below.

<video width="100%" height="300" controls autoplay>
       <source src="" type="video/mp4">

When I post it to the twitter from my website it displays the player as below.

but when I click on play button the video is not played and it disappears as below.

When i developed it before 1 month , it was working fine and the video was playing successfully.

can any one check what is the issue.


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