Planning to get the 925, few questions on WP8

1. Is there any way to upload a video to Youtube directly from the phone. I searched around and the only decent way seems to be sync to PC and then upload from PC. I am hoping (praying) there is some sort of a work-around

2. Is WhatsApp still the battery hogging unmitigated mess?

3. In the HERE maps app, can you download maps for any country. In Symbian, you could download maps for any country no matter where you are.

4. Is the gps signal stable - does it go on a signal hunt for eternity once in a while due to bad network in rural areas?

5. Are the offline maps good for navigation - is it equivalent of online maps sans the traffic?