What video format is best for TV ad ?

These are great suggestions if you work for a TV station.  I produce national and international press releases that will be played on a thousand DIFFERENT TV stations.  I just need to know a good, uncompressed format.

The suggestions above are helpful, but they may not necessarily be correct. 

Here's the ONLY way you're going to know for sure: find out the delivery specifications for your project and work backwards from there.  You have to contact the ad distributor / broadcaster / advertising agency / editor.... whoever receives your work.  Presumably, these people already know what they need from you.  You need to find that out.

If you don't do that, you're only wasting your time.

As the others said, ask your TV station or local cinema for what spec they want and then create your content accordingly based on AE's presets.

Mylenium

Hi,

The composition settings are not going to make a difference to your final product. You need to know what format the broadcast station requires, and that is the format you export your final output to. The composition settings for the duration of the work done to the project can depend on a whole range of factors - generally, from what I have seen, HDTV - 1080 25 (for my region of the planet that is!)

Pierre