This sentence is a bit sneaky, and I almost deleted it. The accusative plural of muña is muñī. This happens to be identical in form (though not in pronunciation) to the nominative plural conjunctive form of muña. Technically you haven't learned this form yet, and have only seen it used in a different way. Even so, since the form exists already at this stage, it's available to be used, and so one of my contributors made a sentence with it.
I have since updated the notes on the skills to make it clear that this is an accusative plural form. My apologies that I hadn't realized this until now. I hope this change helps for the future. If not, I will delete this sentence.
The infinitive form of the verb is: urnegon
v. V-fin. (High Valyrian Verb Tables) to see.
From Dothraki Wiki: https://wiki.dothraki.org/High_Valyrian_Vocabulary
Honestly, the first time I saw the tables and vocabulary for HV, it was so wonderful! This course and all the works about HV is really impressive. I wanted to find other resources and videos (I think I will start to watch more videos about the creator and HV grammar soon), but the Wiki is just wonderful and simplified. I can also say that I feel more confortable learning Hungarian now, and I hope to feel the same with Turkish soon. I am still a little afraid with the Turkish grammar system. I have studied some agglutinative languages as Indonesian before and I would like to learn Arabic also, just to find the relationship between languages, and for sure to see videos and films. =)
It didn't sound like it to me, but I just re-recorded it to be sure. If you ever think you hear an issue with the audio, feel free to flag it and say "Audio doesn't sound correct". It doesn't matter if all the words were right. If you think it was too loud, too soft, too slow, etc. just flag it and I'll go back and listen to the audio. If I think it could be better, I'll re-record it. No problem at all!