> This. Please optimize for casual users and due to Covid-19 social distancing more people are forced to making and editing their own video.

Agreed! I've done my best to do just that - but clearly, you will be the judge of that :)

> 1)Try to enable targeted video size feature for the generated/exported video. Also design a simple UI menu to automatically transcode and resize the generated video according to the chosen video format.

Agreed! I would say I've done achieved this - basically, when you click 'Export', you can set the FPS, and the video format (low, HD, Full HD, 4k - coming soon).

There's also an option for video ratio (such as 16:9, 4:3, and so on) - available via the project's settings. Hopefully people won't think it's buried too deep in the settings menu :)

> 2) Make it easy for the authoring of the sub-title by including dead simple and easy to use vector graphic editor built-in and integrated inside the video editor (not third party full blown vector editor).

Added to my todo list. I want to do it similar to what Adobe has - which will be a bit of work :D But yeah, I'll have it ;)