These files will not be uploaded to anywhere, they're played on your device locally.
Chat logs may take a while to parse, don't worry.
Offset from the video, if recording started too late. It will be set automatically based on how long the chat dump is and the video length, remember to set it to 0 if you want it that way.
1 is standard, 2 is twice as fast etc. Slow the captured video down with this amount to reduce live recording time
The lower the smoother. 16.67 - 60fps, 33.33 - 30fps. Missed ticks shouldn't matter, as the parser is dependent on system time.
These will only apply to newly displayed messages.