I followed step by step the instructions but nuevoplayer don't work. Start always stock player of clipshare. Someone can help me please?

This is your server, your files; nobody else can see it or manipulate.
Read tutorial twice, try to understand it well.
Nuevoplayer was installed successfully on hundreds of clipshare sites with this tutorial.
Don't forget to deonlaod & upload player sources (flash,plugins.skins). Usually it goes to "nuevo" folder.

Each sign, each letter on clipshare can be important. If you miss one or replace - page can stop showing.

Thanks for answer. I will try later. I have only a doubt for this instruction:

Find part of textarea code for embed player.
---------------------------------------------------

{if $vinfo[0].embed_code eq ''}<embed ......................... />{else}
{$vinfo[0].embed_code}
{/if}

Replace if with this code:
--------------------------
{if $vinfo[0].embed_code eq '' || $isyoutube eq '1'}{$embedcode}{else}{$vinfo[0].embed_code}{/if}

I don't understand exactly which part of code I need replace

Sorry, but instruction is very clear.
You need to understand what is written.
"Find part of textarea code for embed player" means exactly what is written.

Also, this is not critical part of installation.
This is only text of embed code that appears in textarea later.
Without it player itself should work fine.

If you have trouble with understanding tutorial, we can't help you more, and you can always consider to order installation service.

Ok, thank you.