Dimo HD Video Converter is basically a generic ffmpeg-based video converter – it’s a feature limited version of Dimo’s Video Converter Ultimate [both versions run the DimoVideoConverterUltimate.exe file]. It works – I successfully loaded a 1080p .m2ts file in AVC/H.264 format – but from the comments on the GOTD download page it probably doesn’t accept anything smaller than 1080 video.
There was a request to compare with the WinX version, so regarding WinX HD Video Converter Dlx, given away at the end of July, 2019… Many similar ffmpeg-based converters can use the minimal support offered for AMD & Nvidia GPU assist by the x264 encoder that’s included in ffmpeg for H.264 encoding, while some can use the AMD, Intel, & Nvidia hardware encoders, skipping x264 entirely for a usually much more apparent speedup. Of the 2 converters, Dimo has the minimal Nvidia Support, though it doesn’t show up in the menus, so may be only be active in the Ultimate version. That said, GPU encoding isn’t trouble-free – the speed boost varies with different models of hardware, quality suffers, and you usually don’t have the full range of encoding settings available using only software.
Both have some downloader capabilities, both have players, though Dimo’s *may* be less generic, and Dimo has their media server. There are better downloaders &/or browser plugins, better players, and better ways to handle media than Dimo’s server, so to me at least it’s best just to focus on their main job, converting video. There WinX may have the edge, since it uses a newer version of ffmpeg. Note however that ffmpeg is itself source code that's compiled into library files & executables, and there are many options [features] that can be included or left out when it’s compiled. The ffmpeg files in Dimo’s converter are much larger than those in the WinX app, which could simply mean something like the WinX devs used compression, or it could mean that their compiled code is more stripped down, i.e. fewer options included. In some situations, depending on input/output formats & encoder settings, & possibly hardware, Dimo’s converter could conceivably deliver better quality at comparable encoder settings – the only way to tell is to test encode a short clip using the same input, output, & encoder settings you plan on using for your project with each app & compare.
When it comes to installation, Dimo adds 1,073 files, 7 folders to the program’s folder, taking up 243 MB. The WinX app by comparison adds 534 files, 6 folders, taking up 121 MB, BUT, there’s an additional 2,556 files, 110 folders added in the User folders. Otherwise the Dimo app install adds files/folders to ProgramData, C:\Users\ [UserName]\, and C:\Users\ [UserName]\ AppData\ Roaming. Both are pretty gentle to the registry, though WinX has a slight edge there.