If you want to transfer YouTube FLV to iPhone 5 for enjoyment anytime and anywhere, you can get the detailed steps here. The solution is easy and quick.
Most of video format files can’t play on the new iPhone like MTS, M2TS, MPEG, MPG, VOB, DV, DivX, Xvid, AVCHD, ASF etc. You have to convert video to iPhone 5.
WMV is a Windows-based video format. No doubt, it’s unsupported by the new iPhone. To play it on iPhone 5, you have to convert WMV to iPhone 5 friendly format.