First, there is no audio on the attached video, so nothing is wrong with your sound card.
Second, have fun kids!
Just to clarify a couple of things that were in the video. The "non-safety match" is commonly known here in the USA as "strike anywhere matches" or "kitchen matches".
They are characterized by the two tone coloring of the flammable material at the tip.
Most of y'all knew all that, but just in case...
The video also says to "remove the red phosphorous" while a video shows a pair of needle nose pliers crunching up the material in the back ground. In actuality, the red portion on the match tip is sulfur, potassium chlorate, fillers, a coloring agent and glue. The white portion is phosphorous sulfide, potassium chlorate, powdered glass and glue.
Also, one should use distilled water. One can never be sure exactly what is in one's tap water that may or may not affect the final product.
If you have access to raw chemicals, you can make your own impact explosive and bypass the whole match stripping exercise. You'll just need red phosphorous and potassium chlorate.
A neat place to buy chems is Science For You.
You will probably have difficulty gaining access to red phosphorous. It is now tightly controlled due to the fact that cooking meth has seemingly become a national pass-time.
However, every time you see a discarded matchbook, or are offered a free pack of matches, take it home. Tear off that little red strip at the bottom (striker). That is red phosphorous mixed with some glue to hold it in place on the paper.
After you have a quantity of these strikers, place them in a CLEAN GLASS container and cover them with acetone. Close the container. Let them sit for a day every once in a while give it a vigorous shake. A canning jar works very well.
You'll be left with a red liquid, and hopefully clean pieces of paper where the phosphorous was attached. Pour the liquid through a coarse strainer (don't use fine as your red phosphorous will get caught up in the mesh) into another clean GLASS container to strain out the paper. Sort through the paper. If you find any with phosphorous still attached, gently wash the remaining material into the collection jar using clean acetone. Discard the paper.
Let the liquid settle for at least 30 minutes. The longer the better as you will see most of the red stuff settle at the bottom of the container. Carefully pour off the acetone. You can save it for more extractions later if you want, just don't use it to thin paint as it will have glue and some remaining phosphorous in it.
Now, you can either set the remaining material in a warm place OUTDOORS to evaporate, or you can pour it through a coffee filter. If you use a coffee filter, set the filter aside to dry. When its dry, the phosphorous will easily come off the filter as a powder.
STORE THE MATERIAL IN A TIGHTLY CLOSED CONTAINER AWAY FROM HEAT SOURCES.
Pour a 50/50 mix of your red phosphorous and your potassium chlorate along with some thin glue (Elmers white glue) and make a really THICK paste. Stir gently! Do NOT strike or MASH the mixture! You can add distilled water drop by drop if needed to thin the mixture as you work.
You'd like to get an even distribution of the chemicals throughout the mixture.
MIX SMALL QUANTITIES! DO NOT MAKE A GIANT BATCH! If there is an accident...you may just wind up looking like Richard Pryor.
Fill your projectiles.
JUST A WARNING! RED PHOSPHOROUS IS HIGHLY FLAMMABLE and is sensitive to impact, friction and electrical sparks (static electricity). It can also release a highly toxic and explosive PHOSPHINE GAS if mixed with certain materials.
Remember, this is just for air rifles...*wink**wink*! Forget you saw that whole part about shooting containers full of flammable gas.....
Don't look at this next video either.