That is because battery is out of charge (empty).

ICE cars are crap

The pilot drill is to long for that style glow plug the element could fall in the cylinder cheap kit not fit for these glow plugs

İşi bilende bilmeyende geçmiş kamera başina beceriksizligini çekiyor.Usta ve işini bilenlere lafim yok.malesef ömrümüzün zamanini çalmayin işi bilmiyorsaniz lütfen.

At 14:04 it appears that you strip the newly cut threads (on the stuck glow plug) by over tightening the tool with the 12mm spanner, and if so, this procedure is unlikely work......which is probably why you didn't show the broken glow plug removed from the cylinder head?

Dumb

Did you not forget to tap the top threads in the head before pulling the lower part of the glow plug out?

ja pierdole zerwałeś gwint i poszło

That's the noise I get with the Caddy when the battery is just a tad too flat. Charge the battery.