TV channels accept advertisements only in the MPEG or mp4 file formats. So, make sure you submit your ads in these formats.
Also, since TV channels have to make sure their programming schedules run smoothly, advertisements need to be booked at least two weeks prior to the broadcast date. Thus, if you are planning to broadcast your ads on Zee TV from 15th April, you must complete your booking process before 1st April. For further queries feel free to contact us at email@example.com or 09038015241.