I couldn't find direct evidence of exactly what you are looking for, i.e. remotely controlled launch pods covers.
Nonetheless I was able to find evidence to all of the necessary components to build such a device: remotely controlled moving launch pads, and launch pads covers. It's not unthinkable that some exist that combine these together. And one picture of what seems to me as a remotely controlled moving launch pad with an attached cover, which would be exactly what is requested, but it's only a picture.
In this PIJ video (0:29 - 0:46)it shows long range rockets launch pads that lie on the ground and rise up automatically when it's time to fire. They are however without a cover, at least in the video.
And this Hindustan Times video (3:54 - 4:02) shows a missile system (out in the open) aiming itself and firing automatically.
There are evidence of using covers for launch pits, in this CBC news report at 6:21 can be shown what is clearly a mortar firing pit covered by a cover. Although it's not shown how it's opened or weather it's manual or automatic.
And this On demand news video (0:56-0:59), reposting an RT video shows a cover in the field being opened, however we don't know it it'd being opened by hand or automatically (looks to me manually) and if it hides a launch pad underneath or a tunnel entrance.
Finally, in this Calcalist video two things can be seen. At 1:50-1:52 this dugout launch pad can be seen swiveling on its axis. But, from the video it's clear that it was covered by the camouflaged net seen in the video ant not a hard cover.
And immediately after it (1:52-1:53) appears a still picture of a launcher with what looks like a cover attached directly to it. But because it's only a still photo and not a video we can't say with absolute certainty that this launcher is remotely operated.
Both those fragments appear during a segment talking exactly about what is talked about in the source (translated from Hebrew by me):
There are long rage rockets, siting on an reusable adjustable launcher located inside the strip's tunnels
In conclusion I would say that the leap from what we have already seen clearly to exist to what is described in the source is very small and if Hamas or the other terror organizations in the Gaza strip want or think it's beneficial for them to have it, they can easily have it.