I've been trying to burn a video file to a blank DVD, then watch it on my TV. It's a lecture by a teacher.

I think I exhausted the (free) possiblities on my Dell laptop without success. Today I tried using Burn on my Mac. The burned DVD lays fine on the Mac, but again I was told by the DVD player (I guess) that the resolution was unsupported or that I must change the resolution of the external device.

I've concluded from my efforts that I must either convert the video file to a different resolution or buy a DVD player that will convert (upsample, upconvert, whatever) the file to make it watchable on my five year old (?) 43" TV. The DVD player is a Rotel and at least ten years old.