Welcome to the fishroom. Has this tank been cycled yet and if so, how? You have a newly setup tank and have introduced two ancistrus which will have nothing to graze on. Have you any driftwood in the tank? Ancistrus need wood in their diet. Keep an eye on the golden ancistrus. He should not be going 'nutso' like that and may be stressed.
You say you have heaps of plants but from what I could see on the video, you don't really - although they will grow of course The ancistrus will enjoy cruising along the leaves keeping them clean. Fast growing plants like hygrophila are good in a new tank.
54L is about 60 x 30 x 30cm isn't it? If you add (slowly) the fish you say you want then you should not add anything else as you will have too many fish as it is only a small tank.
Wait until the tank is well established before adding the honey gouramis as they are very sensitive fish and will prefer a mature, stable tank. The rams also prefer a mature tank (that is, one that is 6 months or older).