I'm not sure. But the YouTube channel is BattleParkWest.
I was following his channel and he uploaded a video of him painting unit patches on 3 Vietnam M1C helmets, one was 101st, another 173rd, and the third unit patch escapes me at the moment (most likely 82nd) I noticed the helmets on ebay with very vague descriptions with ZERO disclosure that the painted patches were recently added. The 173rd ending up selling for $125. BattleParkWest did not include a made up story in his sale but did not disclose that the unit patch was recently painted on.
Not to mention the helmet is fitted with