[Feature Request] Encoding multiple videos at a time.

[TehFridge]

Is your feature request related to a problem? Please describe.
If i want to convert a larger video into a series of flipnotes, its a bit sluggish to replace the config everytime and restart the flipnote encoder.

Describe the solution you'd like
A feature to encode multiple videos at a time into flipnotes.

Describe alternatives you've considered
None.

Additional context
None.