I normally use youtube downloader addon with my firefox browser on my PC. When I am on youtube there is a download button added that has a drop down that lets me select what format I want to download. Sometimes I only want the audio file so I select mp3, sometimes I just want to watch an instructional video but don't need HD so I choose one of the lower resolutions in mp4 to download faster. Then there are the rare occasions that I want a full 1080 resolution and can select that. I would love to have an app that gives me this flexibility to download at 4G speeds for later viewing. I sometimes send the HD video to my LED HD tv via DLNA or All Share app on my phone. I was really hoping for an equivalent in the Android market, even if I have to download it off the net and install it manually. I believe you could trim it if you download it in mp4 since it is one of the most widely used formats.