Phonetics vs Phonology || What do these words mean? How are these concepts different?

In this channel I make videos on topics in Spanish language and linguistics. Mostly phonetics and phonology, but also dialectology, sociolinguistics, and historical linguistics. Many of my videos come from questions asked by viewers in the comment section.
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Phonetics and phonology

[Paganprincess]

I am not studying linguistics but studying for the Praxis for Teaching Speakers of other Languages. Being an elementary teacher I have studied and used phonics for many years; however, the way I need to understand it to become a TESOL is a different context. Just using the definitions of Phonetics and Phonology wasn’t clear and I didn’t understand how its application of these concepts were applied or even important. I have watched several videos but your video was applicable to my native language. Your example sentences really helped me understand what phonology means. Most succinct and understandable video I have found! Thank you!

[ChristopherFF]

Hola. Hey, I just wanted to say I love your channel and you have helped me so much! Keep up the good work. Muchas gracias, hermano.

[dgoins]

In English the double t takes on a d sound. Batter sounds like bader. Letter becomes ledder. In Spanish when the R is surrounded by vowels, it has a D sound. Querer becomes queder. Aire is aide.