O-M-G, FINALLY!! Thank you soooo much Blueloony!! I have tried almost every single thing to fix the messed up sound on my iphone 4s and yours was the only one (that I've been able to find so far), that actually gives a step by step on how to check in somewhere else in settings to see whats going on!! No matter which help forum you go to gives the same answer, but its really a question! People reply to pleas for help 99% of the time with, "Are you sure your phone isn't on mute? Check to see if it is and unmute it." BUT WHERE DO I DO THAT...HOW DO I DO THAT IN MY SETTINGS??? That's what I dont know how to do!! I'm not an iphone whiz at all, so I kept going to "sounds" in my settings, but no luck. I mean, I didnt even know you could mute your phone other than when you're on the phone! haha I'm fairly new to Apple products and Im learning thanks to this place, but people seem to forget that not everyone knows exactly where to go or how to get there! So when I found your advice about going to settings>general>assistive touch>click it on then touch the little white ball and so on, I was surprised that whole deal even existed! hahahaha Like why does everyone reply to help posts automatically assuming we all know everything about the product? Ugh I swear I'm not an idiot, I just did-not-know is all! 😟 To be honest, I still don't know what it is I just did under that assistive touch thingy, but it worked like a champ! haha I will say I couldnt tell if it was muted or unmuted, so it took me a couple of tries and then reopening my game app to see if I'd unmuted it, so I might be a little bit of a dingbat about that, but I got it in the end. Oh, and I also did a hard boot on my iphone after I finished?? Is that what its called? And now I'm good to go, YAY! It's just the weirdest thing though because I have NO IDEA how that happened or how I did it, whatever but it was only my game apps and videos I was recording that had no sound....I had had perfect sound with my youtube and music etc apps so....I dunno??
But thank you very much for advice and HOW & WHERE TO, step by step go and check in another area of settings besides "sounds!" Newcomers like me appreciate very much when we find help like your post offered! I'm just so excited and relieved to have found a solution!!! 🙂