Do it as much as you can. The repetition will sink into your brain. Vlogs are great because you can repeat things - it's amazing how the second time through things will start to make sense that didn't the first time, without any apparent work on your part. Repeat as nec. I had some tough videos on DVD here, and I just watched them over and over and over: eventually my brain started to get better at taking the stuff in. Obviously try to get a variety of signers so your brain stays flexible. I don't know if you're deaf or hearing. If you're hearing, watch interpreters signing while the material is being voiced, or vlogs with voice-over for signing that's currently beyond you. That'll help your brain put things together too. Sometimes when I get stuck I find if I mimic the signing- that can activate some part of my brain that sort of manually recognizes the signs when I couldn't do it visually. Usually when the sign looks different enough that I don't recognize it to see it, but I can feel what it is as I make the handshapes and motions.
