The clip talked about underwear and paper clothing in which they were made to run home under threat of opening fire on them if they didn't move fast enough. The idea behind it is to humiliate. So, naked or inadequately clothed (which means naked to some people - a haredi Jew would feel the same - if dozens of people saw them, there could be truth in it. Certainly the army's response that it is "unknown" in the army is not satisfactory. Let them investigate.
U.S. sanctions Russia's state-owned arms exporter Rosoboronexport (Reuters)
from the article: Gazans: Palestinians detained by IDF return naked