Can the phone connect to the smart TV via Bluetooth or Wi-Fi to watch TV videos?

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Yes, smartphones can connect to smart TVs using Bluetooth or Wi-Fi to stream videos, but the methods and functionality differ slightly between the two.

• Wi-Fi Connection: Different with wireless transmit TV to other room's TV with video extender, the most common way to connect a smartphone to a smart TV is via Wi-Fi. Many modern smart TVs support wireless casting technologies such as Google Cast (Chromecast) or Apple AirPlay. These technologies allow you to stream content from your phone to the TV over the same Wi-Fi network. Apps like YouTube, Netflix, and others have built-in casting features that let you directly stream video from your phone to the TV. Additionally, some TV manufacturers offer proprietary apps, such as Samsung Smart View or LG's Screen Share, which also use Wi-Fi to establish the connection.
• Bluetooth Connection: While Bluetooth is supported by many smart TVs, it is typically used for audio or simple file transfers rather than streaming video. Bluetooth has limited bandwidth, so it is not ideal for streaming high-definition video content. However, if your TV and smartphone both support Bluetooth video streaming, you may be able to use it for lower-quality video, although this is less common. Bluetooth is mainly used for pairing external devices like wireless headphones, speakers, or game controllers with the TV.

In conclusion, Wi-Fi is the preferred method for streaming videos from a smartphone to a smart TV, while Bluetooth is more suitable for audio and peripheral device connections.