HD and super-HD resolution supported where available (720p, 1080p - up to 4K)
iWebTV plays well with 99% of all videos you will find online (excluding video formats not supported by Fire TV)
Full playback controls from the controller app & remote: play/pause, skip video segment, 30 seconds jump in either direction etc.
Keep browsing the web to add more videos to your playlist without interrupting the current video
Full-featured browser & familiar navigation controls so you're already up to speed in the iOS app: bookmarks, home page, back / fwd, search or enter url from the URL navigation bar