Yes, that's part of the dropping consonants, the Dih-un and Impor-un, ghetto-type speak I noted.
Yes,they do the glottal stop thing in place of a soft T or D.
In many American dialects, the glottal stop is sometimes used in place of a hard T, especially if the word ends in “en” or “on”(eg kitten, cotton) or even a soft D (eg Biden, cordon).
Glottal stop video:
https://m.youtube.com/watch?v=_4MJUi03GHM
Glottal stop print:
https://www.babbel.com/en/magazine/glottal-stop
But the thing I most wish they would clean up? F’n using the F’n Fword F’n five F’n times in every F’n sentence!
The use of ‘I know, right?’ Right? Right? drives me inane as well.
Thanks for the video. It’s sorely needed.