Hi,
I have 3 years working experience with C/C++, Python, Perl, yang and Bash Script in Embedded System on many Linux distributions so I confidently that I can get your project done without any defects.
About your project,
Firstly, I will design the template for your UX/UI
Secondly, I will write the code for recording.
Thirdly, I will use wxPython platform to program your UX/UI as discussed, including start/stop button, resolution, saving folder and open buttons.
For more detail plan, kindly contact me for more detail information.
Thank and looking forward to hearing from you soon.