It only works on pagesFB Personal pages no longer work

If adding this code for Youtube.I get error 500 Als deze code voor Youtube toevoeg.Krijg ik error 500

I have placed it in; wp-content ► themes ► jolene ► functions.php It does not want to work.What am I doing wrong? Addition Yes, it worked, it works Th...

I had copied it and pasted it.Now the spaces are removed, and works well. Am so glad that you help meThank you very much

Thanks for your responseDone, unfortunately it does not work.Tested in Crome and Edge, unfortunately no result Schermafdruk-2018-12-26-10.54.02....

Thank you very much.I'm going to try, with my bad English

Thank you.I have the problem that the text does not fit .It must be just a little bigger Schermafdruk-2018-12-25-15.23.49.png

Thank you very much

Thank you for your response. Where should I place this?