Picasa web is now integrated into Google+ account. You can easily backup iPhone photos and videos to Google+ or Picasa web account by using 'Google+ Auto Backup' feature. This feature allows you to automatically backup photos and videos from iPhone to your Google+ account. When you are trying to turn ON Auto Backup feature, you will see a message 'Please turn ON access to Photos in your device Policy settings to allows Google+ to access your photos and videos". That means you need to allow the Google+ app to access your photos. To allow Google+ app, open your iPhone's settings and tap 'Privacy' and then 'Photos'. Switch ON 'Google+' app on your iPhone.
You can install PicBackMan's Picasa uploader for Mac from the website and start backing up photos and videos.
Quick Tip to ensure your Photos never go missing
Photos are precious memories and all of us never want to ever lose them to hard disk crashes or missing drives. PicBackMan is the easiest and simplest way to keep your photos safely backed up in one or more online accounts. Simply download PicBackMan (it's free!), register your account, connect to your online store and tell PicBackMan where your photos are - PicBackMan does the rest, automatically. It bulk uploads all photos and keeps looking for new ones and uploads those too. You don't have to ever touch it.