I have pinged you personal message @Jennifer_Dungan 

Even I tried using the YouTube playback extension, creating rules & data element were all successfully build but when I load the website page displays YouTube playback id error and return the black blank screen. I have also connected with him on above and working on it.

Adding to the above, i published the extension "video tracking for youtube" the build was successful, when i created the dataelement using the extension then the build was failed, I interrupted in the console and got to know getVideoData() is not defined from console even when the iframe_api is load...

I have attached the file which i referred for implementation 

yes it is important to check in dev just to ensure code works fine before it moves into production. Thanks a lot for helping me on this.

Thanks Jennifer, the above domain is not our live url we get live url like www.lt*******.com.And I am using getvalonce, previous value, new/repeat plugins 

Adding to the above, found that my website i am working on dev environment is with the url hostname like "https://publish-e-254678/adobeaemcloud.com" the domain name set by adobe  cookie is all complete hostname "publish-e-254678/adobeaemcloud.com"(when you check on your website it would be digitalt...

Hi Jennifer, yes it sets from the javascript code, code interpretation is fine and i am working even in console trying to setup still it didnt write a cookie from a getpreviousvalue , and all values i have setup using the template only this previous value i am setting up over here in custom code, wi...

Thanks for the reply, i have asked them to not encode and send it again like down<iframe class="cmp-embed__youtube-iframe" title="youtube video" data-cmp-data-layer="{&quot;youtube-carousel&quot;:{&quot;@type&quot;:&quot;core/wcm/components/embed/v1/embed/embeddable/youtube&quot;,&quot;repo:modifyDa...

thanks for the reply, custom codes are working it looks like there was some cache issue. plugin custom codes were not returning value were not working as cookies are not setup from plugin as we dont have cname setup which is required i guess.