I found the easiest way to get classic tv show content to play on my vintage TV's with the proper aspect ratio without going through a convoluted processes is just use one of those media converter boxes that are listed on Ebay. i got one of those a few months ago & they work nicely. i download a lot of my classic TV shows off of You-Tube, Which i got a large collection. i use a program called YT-download, which downloads them as mp4 files. i just copy them to a flash drive & plug it in this converter box.
The converter box has both a NTSC (via coaxial or composite video) & HDMI outputs). the RF outputs to channel 3 or 4 (NTSC)
the pictures below are showing playing Mr Lucky off of the attached flash drive.
