> (i) TikTok videos are high-definition, fluid videos with catchy music. TikTok's compression algorithm almost seems lossless since videos are much more crisp than on Instagram/Facebook. I even believe they are upsampling videos from 30fps to 60fps (although this is just a personal observation and may be wrong). The catchy music is probably self-explanatory.
This is something I didn't think about: do they play video by itself and sync the audio to the video? They could then cache the audio once, and replay for all similar videos.
This is something I didn't think about: do they play video by itself and sync the audio to the video? They could then cache the audio once, and replay for all similar videos.