sony xperia xzs phone for scope cam 960 FPS Slo Mo

Slow mo on phone is useless. The Sony xzs can only record .18 of a sec at 960fps. Not even 2 seconds. The samsung s10 can record 4 sec of 960fps and still useless. If it cant record 1 min or at least 30 seconds min, it's useless. How to do plan to record .18 of a second at 960fps? Plus you cant zoom in when taking slowmo so you get a tiny window with not enough light though. 
 
https://youtu.be/xwukJoSO0NE

Is this bad for an iPhone 6 Plus E? 
Mail box is 75 yards. Green grass ends at plowed field 143 yards in-line with shot. I stated 185 yards but it’s a tid bit more. I was aiming for the 3” wide run off stream where it was pooling. That field I know every bumb and distance. If you call that shot South Eastern direction which it’s almost true South, the fields to East are over 500 yards out from my current bench & I could gain another 100 yards. 

When we tried the longest shooting I EVER tried with airgun, 316 Leica laser ranged yards. I was honestly shocked. I’m thinking these airguns really can do this. Not only that but my normal out to 200 yards with JSB 18.13 to H&N 21.14 Kodiaks or Baracuda Match only show dirt strikes if it’s dry and not grown over. I was surprised & thrilled because we were given permission to shoot in mountain of shale, wood chips, sand, gravel where visual strikes of retained slug energy actually SHOWED me where I was hitting. Seriously I never tried anything like this before. I’ve estimated Groundhogs at 3-400 & tried with Savage 112 bull barrel .22-250 & Federal factory loads but my furthest kill ever was 172 yards with an AZ Rapid MKII .25 spitting King 25.43 at 880 FPS for 44.69fpe. ANYONE HAS IT, I’ll buy it back!

Besides messing with a few 06 rounds at farm shooting 800 yards at 15-18 years old and being amazed at how much drop & impact to right I had, I can tell you airguns have taught me more than occasional weekend trips to a far away 100 yard range or 1000 yard farm ever could have. Heck, if I had a nice .243 again or .25-06 I don’t think 800-1000 yards would be hard in early morning no wind conditions, only because I’ve shot countless JSB 18.13’s at 200 yards in all weather & 10-12’ of drop depending on tune, pellets, head, tail winds, or absence of. Not only reading wind but judging scopes and learning to use mils as range finder.

So what type of phone camera (IPhone 11 pro camera?) or real equipment is needed for quality slow motion. Why would I want it except for studying at what distance/speeds my pellets & slugs are under/over or destabilizing at distances and can any camera catch this if destabilizing is occurring past 200 yards? 
AGN member Sigma has a very heavy high quality tripod & a pair of expensive 40x90 or 40x96 Kowa binoculars we filmed other video through. He has an eyepiece for IPhone 10 and in that video you can barely make out my one hit on 11”x14” flat slab of paver. He zoomed in & confirmed. He was behind to my left. My cocking of monster Supermagnums bolt STILL shook that iPhone from 4-5’ away on almost $400 tripod leveled with heavy Kowa nocs on it.

So if lighting was behind me. If I were to buy a tripod and whatever you guys recommend. Would I even be able to see things like Harry Fuller’s documented gyroscopic destabilizing pellets when pushed too fast or even predicted when they failed roll test on glass miserably? I’m just wondering what I could learn. I’m not so interested in making YT videos but if I had equipment & eventually showed what guns I own are capable of with pellets to slugs, I gladly would if I & others learn from it.