How to watch videos on my iPhone 4S?

I'm trying to watch a video on my browser (not from YouTube) but all I get is audio and no video. The only thing showing up on mu screen says "TV connected. Connected to TV". Tried different browser, chrome vs safari, same thing happens. Tried different non YouTube videos as well. Haven't changed any settings and definitely didn't connect to my tv, so I don't know what's happening.

Most likely it's flash videos, and iPhone doesn't support flash.

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