I have done that in the past (from a CRT TV), also in B/W, but TV's have much more resolution now. I used the raw material to crop it to pleasing compositions. If you only look at the result there is not much difference shooting from TV or on the street.
To me it seems all your frames are a bit too much stretched horizontally, I think they will appear more natural after a slight resize.
A variation is to make screen dumps from video's on a computer screen (you can easily stop and replay scenes). It's fun to get all sorts of unexpected images and to modify them afterwards (if you like post processing on the computer). You can get plenty of material in a short time sitting on the couch at home that's for sure.