Visual force page
<apex:pageBlock >

<apex:commandButton value="Send" action="{!send}" />

</apex:pageblockSection>
<apex:outputLabel value="AddRecep" for="AddRecep"/>:<br/>

<apex:inputText value="{!AddRecep}"  id="table2"/>

 <apex:commandlink onclick="openPopup();return false;" value="Add Recipients" />  
<br/><br/>
<br><apex:outputLabel value="From" for="From"/>:
           {!$User.FirstName} {!$User.LastName}
</br>
<br/><br/>
<apex:outputLabel value="Subject" for="Subject"/>:<br/>
<apex:inputText value="{!subject}" id="Subject" maxlength="80"/>
<br/><br/>
<apex:outputLabel value="Choose Video "/>
<apex:outputLink onclick="showpopup(); return false;" > <br/>

Click here to choose session </apex:outputLink>
<br/><br/>

<apex:outputLabel value="Body" for="Body"/>:<br/>
<!--<apex:inputtextarea value="{!body}" id="body" styleClass="ckeditor" richtext="false" />-->

<apex:inputtextarea value="{!body}" id="body" styleClass="ckeditor" richtext="false" style="width: 500px; height: 150px;">
</apex:inputtextarea>
<br/><br/><br/>   
         
<apex:includescript value="{!URLFOR($Resource.CkEditor,'ckeditor/ckeditor.js')}"/>
</apex:pageblock>

Controller

  public pageReference send(){
   
    Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();
  
    List<String> toAddress =new List<String>();
    
   
  if (AddRecep != '' && AddRecep != null) {
     toAddress = AddRecep.split(';');   
    email.setToAddresses(toAddress);
    email.setSubject(subject);
    email.setPlainTextBody(body);   
  Messaging.SendEmailResult [] res = Messaging.SendEmail(new Messaging.SingleEmailMessage[] {email});  
  for ( Messaging.sendEmailResult result : res ) {
           if ( !res[0].isSuccess () ) {
               System.debug ( result  );
           }
           else{
               ApexPages.Message msg = new ApexPages.Message(ApexPages.Severity.INFO, 'Email Sent Successfully' );
               ApexPages.addMessage(msg);
           }
       }
 }  
return null;        
}
public List<video> ConsoleWrapperList1{get;set;}
public String consolewrap{get;set;}
public void callapi2(){
     String  SessionId = '';
     for( consolewrap cwt : ConsoleWrapperList){
         if(cwt.selected){
              if(SessionId == ''){
               SessionId += cwt.sid;
              }else{
               SessionId += ','+ cwt.sid;
              }
         }
     } 
 
     List<video> ConsoleWrapperList1 = new List<video>();
    HttpRequest req = new HttpRequest(); 
    HttpResponse res = new HttpResponse();
    Http http = new Http(); 
    req.setEndpoint('http://webapi.demomail.net/test/SendVideoBody.js?id='+SessionId); 
    req.setMethod('GET');
    res = http.send(req);
    if(res.getstatusCode() == 200 && res.getbody() != null){ 
        String replaceIllegal= res.getbody().replaceAll('\n','').replaceAll('\r','').replace('','');
        ConsoleWrapperList1=(List<video>)System.JSON.deserialize(replaceIllegal,List<video>.class);   
        body = ConsoleWrapperList1.get(0).bodyT;
  
}