For many times I have struggle with sharing photos or videos or big files over internet using messenger app. It's not only consume my mobile data but also speed is really slow and sometimes it is compresed and become low quality. Could you share with us what file transfer app do you have? Cheers~
For me, in fact I usually share many photos and videos through cloud drives such as Dropbox, Google Drive, etc. But in order to save the storage on phones or computers, I employ MultCloud as it's a web-based tool so that I finish all things just from browser. If you own some clouds, suggest this.