Hmm.... sorry 2 say... u have not spent eunf time n effort on the box.

Covenenant addon in kodi is dead or half dead.
Read kodi thread, try other addons others have mentioned.
And try QUASAR addon... read, watch utube videos on how to.
Quasar is the only truly fabulous kodi addon, imo... all movies n tv shows, 1080p, 4k even, dd5.1, dd+5.1 with yr box,.
Assuming firmware 2.0.5, 2.0.6 and kodi 17.6.
And if u dislike kodi, u can always use other apps.
There is terrarium, freeflix, showbox, etc... dozens of them, good hd stuff.
Not to mention great livetv apps, eng or chinese or french or german, in hd.
Of course, u need to read to find these apps n install them.
I posted many of these, but few people bother to read n try, i know.
Yr Hdmovie app is likely out of date, cant use, need new version... or try other apps.
One needs to understand these apps n kodi addons are done voluntarily, some owners living on ads.
If owner does not maintain well, it dies.
Or in the case of kodi addons, owners get legal letters from authorities... google "kodi news", u read them.

Key is to keep up, keep finding new and working apps... thats how free android apps work.
Yr speed is not great but acceptable, can get quite a lot.
Higher speed gets u more, more in hd.
But the requisite is u yrself must learn how to get them, takes some work.
There is a tremendous amount of good free stuff in the wires, just need to know how to catch them.
Right now i am watching a live sports channel, waiting for 11pm epl matches.

Above is about online streaming.
The other part is local playback where u play files in hdd with usb port.
Your box is among the best for that purpose, has an excellent native player.
Capable of almost all formats... incl 4k full bluray menu.... and... dd, dts, ddtruehd dtshdma, dtsx, ddatmos for audio.
Of course, u first need to get those files which can run to to 90gb each.