Question about iPhone texts?

So I had a question about the read recipes for an iPhone. It initially marked my text to him as read (like it should when the read recipts are enabled). After a while though, the same read text showed up as delivered.

Does this happen when read receipts are disabled or is it some kind of glitch?

How can I crop a video vertically?

I shot a video with my iPhone but someone's head is shown at the bottom. I'd like to omit this person since she doesn't want to be seen on Facebook. I know how to crop horizontally on the phone but I'd like a free 3rd party software recommendation with more cropping features.

IPhone 8's sound/volume issue?

My iPhone for some reason this morning decided to act strangely. Whenever I watch a video on YouTube or play music I can barely hear any audio even when the volume is turned all the way up. The audio is very faint and low I can still hear whatever video or song I'm listening too but it's extremely low. If anyone knows a fix or solution to this issue please let me know! The earbuds are not plugged in either.

How to get my so called friend to pay me back because she cracked my phone screen?

She was using my phone to call her parents, asking them if she could go out on Saturday with us. Her parents said no, so she got mad and THREW my phone down on the ground in frustration. It's an iPhone 6s by the way, and I only got it a few months ago for my birthday.

I pick it up and yell at her for cracking my screen. Her excuse is "Oh sorry. I was just angry because of my parents, y'know?"

How dare she? What can I do?

Some things have on my iPhone are in Spanish, and some are in English?

A couple weeks ago I changed my phone language to Spanish because I'm going to Costa Rica and the Dominican Republic soon so I wanted to practice my Spanish. But I changed it back a few days ago, but a lot of things are still in Spanish? Why? How do I fix it? I have iOS 11.2.6 and the iPhone 7plus if that matters any

Does music acting CRAZY and acting up have to do with the iPhone 8 dongle or something else?

Whenever I use headphones and plug them into the dongle, anything I listening to like music, podcasts or anything for that matter starts acting up (pauses randomly, skips songs, forwards randomly). I have restarted my phone many times and nothing has really changed. When I do keep the iPhone and dongle still and not moving, sometimes I can actually listen to like one song in peace… The weird thing is that when I plug in the AUX cable in my car, music works perfectly fine. If I could, I would just throw this away but I'm not rich. Some Please give me a solution.

Added (1). Sorry for the bad English, forgot to edit ^

Added (2). dongle is the adaptor cable