How many videos does 1.5 GB hold on my iPhone 4?

I wanna download movies on my iPhone 4 but I only have 1.5 gb

I can get films that are in 720p, full length for around 400mb so if you were to download the same films, its be like almost 4 films

Depends entirely on the length and resolution if the video, with the information you've given, no one can correctly answer this question.

This question is impossible to answer, it would depend on the size of the videos.

That's about one 90 minute movie. Time to free up some space!

It depends on the quality and length of the video(s) you want to get.