I converted my entire DVD collection to MP4, and use Plex to stream them to my ROKU.
Similar.
I have taken many of my DVR recorded programs, removed the commercials and saved them to an NAS (wireless capable) 3 TB hard drive. The hard drive feeds through PLEX to Roku to widescreen TV.
I also have a WD HD Live box (Western Digital media streaming box).
It is surprising how much more continuity a TV program or movie has when it isn’t split up by commercials.