What did a "1MB" 3GP file actually look like? Technically speaking, these videos were brutal by today's standards:

Total bitrate—the amount of data processed per second—is heavily restricted. For a 1MB file, the video bitrate is often set between 50 kbps and 100 kbps, while the audio bitrate is lowered to a bare-minimum mono stream of 12 kbps to 32 kbps using codecs like AMR-NB (Adaptive Multi-Rate Narrowband) or AAC-LC.

: The site focused on the 3GP (3rd Generation Partnership Project) container, which was the standard for mobile video on 2G and 3G networks. Compression Priority

To save space, he would drop the frame rate to a jittery 10 or 12 frames per second.