I have Sony Bravia TV and an Apple iPhone. How can I connect both of these to watch video on TV?
More information about the TV model and/or connected devices, such as gaming system or other Wi-Fi connected device, and iPhone model could help in giving the best, quickest, and possibly cheapest method to connect both devices together for what you want to do. All of these suggestions are great, but you want to know how, abd we need more details so we can give you the best advice on how to go about this. DLNA would be a great option as it is wireless, but you may also be able to use a cable to connect to the TV, as well, but that depends on the iPhone model.
maybe iPhone-App "iMediaShare" can help
There are a few options here:
You can use a DLNA app on your iPhone and then connect to it using the TV's "smart" features. This will require both devices to be connected on the same network and it will drain some power on the iPhone so make sure it is fully charged or connected to a power source. Example:
You could also get an Apple TV and stream your media using AirPlay.
Or you can use a digital AV adapter to connect the two devices.
You can create a wireless network between yout Sony Bravia TV and your mobile device using Sony UWA-BR100 Wireless Adapter.