You can make hash very easily from your trimmings! The process that is outlined in the video is similar to how Kief in the bottom of a 3 piece grinder is made. In my opinion that process is very time consuming and not very feasible if talking about doing large amounts.
Here is how I go about making my hash:
Get a set of micron bubble bags as mentioned above, you can find a good deal on a set here:
http://www.virtualsunhydroponics.co...&CAGPSPN=pla&gclid=CJvGrtjk5ccCFUdufgodno8OIQ
After you have the bubble bags, go to a Vons, Albertsons, SaveMart, etc. Ask the register worker for a couple pounds of Dry Ice. The amount of DI needed depends on the amount you are processing. From reading your original post though, I think 5lbs will be more then enough. Should only cost 5 to 8 dollars max.
Now that you have everything find a smooth and large surface to extract over. Youll also want to take a small cardboard box and cut the top and bottom off. Take thick plastic and line the inside of the box. This will act as a catch to make sure no material is lost to the sides.
Take your DI and crush it up to golf ball sized pieces. Then take your 220 micron bag and begin to layer your materials as so:
Dry Ice - Trimmings - Dry Ice - Trimmings
Until you have just enough space left to grab the bag and secure the top tightly with a closed hand. Once you have done this, fold the top closed and allow the bag to sit for a few minutes. You will notice the outside of the bag frost up and begin to look "chilled". Now you are ready to start extracting, place the cardboard box over your flat surface with the bottom on the surface and the top exposed. Grab the bag and secure it tightly with your closed hand. Hold the bag inside of the box and start shaking the bag and material up and down.
You will see a beautiful amber cloud come rushing out and fall to the surface and being caught on the inner edges of the box. Keep shaking until you notice a change in that color. Then pick the box up slowly and move it to a new corner of your flat surface. Begin shaking again and repeat the process until you are getting nothing but plant matter out of the bag.
Dump out the contents into a strainer or tray and pick the Dry Ice chunks out for the next round. You can even do this with your plant stems and get amazing quality hash. I wouldn't recommend running both together or running large stems through the bags either. As they have a tendency to scratch and rip the lining of the bags when shaking. So when doing stem runs make sure you cut them into small pieces first. After your done for the day, either store the DI in the freezer till later. Or place the left overs in your Flower area for an added co2 boost, it will dissipate within a day.
I will be doing another extraction soon and will take pictures to make a pictorial post. Hopefully that will better help fill in any gaps I may have left out. Hope all is well with you and yours man and hope this helps! Happy growing!