Help Video formats through HDMI out

[skpd]

so I tried two different files so far in 720p, an .mkv and an .MPEG-TS . neither show up in the EVO's video gallery.

any thoughts?

 

[sitlet]

i'm having a hard time just playing videos with the phone screen. i followed every instruction on here, saying to use handbrake and set the video width to 800, but no videos i have converted will play on the phone. the sound plays fine, but no video.