https://clousc.com/player.php?ver=32 a link that i cannot remove?! Help, please

Hello ppl,
I am not so good yet in using WordPress, so I need your support,
at the end of my post after publishing the following link appeared:https://clousc.com/player.php?ver=32 and whatever, I tried to remove, delete, it stays there after saving the new changes.

Anyone has an idea what is is,
here is the post, where I have this link integrated and I cannot delete (it appears at the bottom all the time)
https://karvakg.wordpress.com/2015/09/08/spending-a-90-min-in-a-salt-cave/

thank you very much for your help