Not a standalone app but try piped

Vinegar is a safari extension that gives you premium’s features. I’m almost certain it can do at least 1080 if not higher.

Install Vinegar: https://apps.apple.com/ca/app/vinegar-tube-cleaner/id1591303229

Pulls the actual video file from YT, stripping ads, overlays, and anything else YT shoves into them. Literally a game changer on Apple devices.

Try sideloading uYou+

Brave removes ads.

But also… it’s Brave which I’m learning is not the most ethical choice.

If you're willing to go through the pain of sideloading on iOS and you're ok with giving a random app your Google account, uYou+ is pretty good.

Yattee

Add https://r.yattee.stream/manifest-invidious-piped.json to your locations manifest.

use sideloadly https://sideloadly.io/ and download the ipa from here: https://github.com/arichorn/uYouPlusExtra once you set it up all you need is to literally open sideloadly once a week on your pc/mac and hit refresh while the iphone/ipad is connected to the same wifi. apple doesnt let you add apps for longer than week unless you pay to be a developer so a 30second job to refresh the app and ur done.

I use Yattee. It should be on the app store. Requires a bit of setup, but works great.

Sideload or jailbreak depending on device

pin any invidious instance as a webapp in home

some instances allow to register and follow channels

There are ways to sideload apps on iOS but I think you need a Macbook to do so, I had a iPhone once because I got it for free and I will never touch one of those ever again!

I use Safari on IPadOS with many Plug ins Sponsorblock and AdBlock

have try with this method

Been using VideoLite a lot, there’s a single ad that plays as you open it, and then you’re set. Optionally you can pay £1.59 every three months and skip that initial ad.

Other than jailbreak I don't really know I haven't use IOS in years