Vowel /oʊ/

This video compares the monophthong vowel /o/ with the diphthong vowel /oʊ/.

[ramzy-]

Is there /ʃ/ sound between the letter T and R in words like truck and metro. thank you.

[ramzy-]

Hello, in american accent there are two difference vowel chart IPA, for two symbol :
1 - is this symbol /e/ the same sound for /eɪ/
2 - and is this symbol /o/ the same sound for /oʊ/ can give me example for every symbol.
- is /e/ and /o/ Americans
Thank you so much.

[ramzy-]

is /Ju/ diphthong as in use /yuz/ - /juz / or just two sounds in american accent. Thank you.

[ramzy-]

- i'm still confused, is the flap T, is soft d and like second d in DADDY as in ( putting and pudding )

[ramzy-]

is /ɝ/ and /ɚ/monophthongs not R-colored or diphthongs, why. thank you.