Mandarin Pinyin Pronunciation Resources
In English:
dong-chinese's pinyin guide and tone trainer: https://www.dong-chinese.com/learn/sounds/pinyin
Yoyo Chinese's pinyin chart: https://yoyochinese.com/chinese-learning-tools/Mandarin-Chinese-pronunciation-lesson/pinyin-chart-table
Yoyo Chinese's tone pairs chart https://yoyochinese.com/chinese-learning-tools/tone-pairs
In Mandarin:
This video is a Mandarin speaker going through the pronunciation of all the initials and finals : https://youtu.be/qKep0hxW_hE?si=xTEEIOj05_pRfRBV
This Mandarin video playlist that goes through pinyin pronunciation too: https://www.youtube.com/playlist?list=PLJGfzjcr6g7hC2uptvrKYncItJ9La_dwU
Contains Cantonese:
This 03粤语音标录播课程（粤语拼音）13节课 playlist is a Mandarin speaker explaining Cantonese I think, but the comparison between the pronunciations might be useful: https://youtube.com/playlist?list=PLF9R18laHAEWYcgiwLkLFXQrBG2S3Zr3-&si=nwAR100nV2Q4LTRd
In Cantonese:
This 普通話教學（成人版）playlist may be a Cantonese speaker teaching Mandarin pinyin, but I am not sure how Cantonese sounds so I'm not sure it's Cantonese: https://youtube.com/playlist?list=PLkcEKTxdjHdQ5fWw8_imZXoJjkheMvWtD&si=cDSH-6l_cCcnr0mD