iPhone 4s - convert/upload/view Quicktime to mp4 or similar

[hermitical]

Hi, more in the ongoing saga of my better half's phone.

It's an aging iPhone 4s, currently stuck on iOS 8.1.3, will only be able to update to iOS 9.3.5 at the most once enough space has been made.

Main problem is a few Quicktime videos, short in length but taking up a big chunk. If I downloaded and converted them into a different file type, making them a lot smaller in the process, will I be able to just drag and drop them back, and then would they be watchable without needing any other app?

I don't use Apple stuff and I don't have or want iTunes on my laptop, most answers to uploading seem to invoke iTunes.

 

[cybershot]

is it logged in with an icloud account? you can download, convert re upload via the web interface then.

 

[hermitical]

cheers, it is now. I actually played about and went through some optimisation process which gave us an extra gig and a half.
Even better she has asked for a new phone from work which is going to be an Android so we can stick in a mighty SD card and stop worrying about all this nonsense any more!