MMS Video Issues

Hey guys I'm on t-mobile and I've been having issues with sending video via mms and just want to know if this is normal. My sister texted me a video from her iPhone 6 the other day and it looked horrible. Very small and very blurry. She sent the same video to another family member (also iphone) and it looked great. I don't remember that happening with my Note 4, so I had my other sister with a a note 4 send me a video and it was also tiny and blurry when I got it via text. Turns out video I send them is also tiny and blurry but they can send each other video and it looks fine. I thought maybe it was because they're on Verizon, so I send my friend who is on t-mobile with an s5 a 5 second video and it's the same thing... Blurry and very small. I sent it to myself and it's fine. I know MMS is limited, but why can other people send short video and it's fine but when I send or receive it looks horrific? I don't think this happened on my Note 4. I know there are other ways to send video I'm just wondering why it seems to work fine for other people.

Edit: BTW I'm using Google messenger (tried it with stock Samsung app but no change) and instead of showing a thumbnail of the video that I have received, it's just a grey box with a play button in the middle. I've tried downloading them before playing them and it looks the same (horrible). I have made sure that it is set to automatically retrieve mms. Can't figure this one out.