Video is "فيديو" in Arabic and it's pronounced as "video" in English and most people use it. Translating "a video message" to "رسالة مرئية" sounds very formal. It's not used commonly and it literally means "a visual message" or "a message that can be seen" and it's not natural in my opinion. languages borrow words from each other which is completely normal and using the word video is widely accepted in Arabic