I think generally installing another DE on top of an existing one (assuming you already had one) is not recommended, as they might use some of the same config files and mess them up for each other.
I have had a few (I think only 2) CDs that actually included a few different formats in the filesystem, otoh ogg, flac, MP3, and wav. That was a nice surprise when I was preparing to rip them.
There is this technology to replace the physical boards on the pitch by customized ones by processing the video
Is this a consumer product, or are you talking about the augmented reality stuff they're doing in sports broadcasts nowadays?
If it's the latter, that's not something you can do yourself.
They have fancy ass tracking for pretty much everything happening on the field, so they can have a full 3d representation of the field, which makes it pretty trivial to place stuff in the scene. If you don't have this data, and you're just working with a 2d image, it's gonna get a whole lot more complicated.
Or you could leave the mirrors as they should be, and just turn your head to check your blind spots?