Before the dominance of the YouTube and Netflix apps, the mobile web was populated by thousands of small video portals. These sites were often optimized for "WAP" (Wireless Application Protocol) browsers.
It focused on maintaining just enough quality for a 176x144 or 320x240 pixel screen. www six video 3gp com top
Modern tech now automatically adjusts quality; if your signal is weak, the site lowers the resolution (similar to what 3GP did) without you ever needing to change the file format manually. Conclusion Before the dominance of the YouTube and Netflix