Those lists I linked earlier aren’t the only ways to find longform videos on YouTube. With advanced search terms (via this list at Digital Inspiration), you can narrow your searches to HD videos that are at least 20 minutes in length. Just add the words “long” and “HD” to your searches, separated by commas. For instance, you could search “pearl jam concert, long, hd” if you feel like rocking out, or search “wildlife, long, hd” for some nature documentaries. Keep in mind that this only works on the desktop browser version of YouTube [.] – Jared Newman, TechHive 

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