hello,
for the project you ask, you will need a raspberry pi which has an advantage of
a relatively strong processing unit and an easy to work with operating system,
these are impotent in playing media files.
the cost of a raspberry pi 3 model B is about 3000 INR.
the cost of a 4.3' inch screen is also about 3000 INR.
(note that this price does not include the SD card price.)
for creating a python script that automatically plays a video when the raspberry pi is on,
and also handle the screen connection, i request 5000 INR.
thank you for reading and have a good day.