We've all been there. You shoot a stunning 4K video on your iPhone, send it to a group chat, and suddenly it looks like a potato. Or worse, it just spins forever and never loads for your friends.
The "Speed vs Quality" Trade-off
Telegram is built for speed. When you upload a video, their servers aggressively crush it down to save bandwidth. They don't care about your color grading or sharpness; they just want the file to be small.