I was sent a video about the effects of gun control on Australia after 20 years have past since they confiscated all guns.

The Truth About Gun Control In Australia
https://www.youtube.com/watch?v=ur8lbiModEI

At best, the summation is thus, You are entitled to your opinion. What you are not entitled to is your own facts. Here are claims nd the facts, along with sources where you can review the facts from. This video is merely cherry picking out statistics that it likes for its own end.

“Cherry picking
The selective use of data, or cherry picking, is a commonly used method of extracting the “right” answer. This is true even when all the data tells a completely different story.

Cherry picking often exploits random fluctuations in data. Firearm deaths in Australia have declined over the past two decades, but from year-to-year one can see variations up and down. Bigger fractional fluctuations are likely if you shrink your sample size.

Leading US pro-gun lobby group the National Rifle Association (NRA) was cherry picking when its publication, NRA News, reported this statistic from New South Wales:”
http://theconversation.com/faking-waves-how-the-nra-and-pro-gun-americans-abuse-australian-crime-stats-11678

time

1m02
claim: “All measure of violent crime have increased”
https://www.snopes.com/fact-check/australian-guns/
“The rates of various types of violent crimes (sexual assault, kidnapping, homicides of all types) have scarcely changed at all, and while the robbery rate rose substantially in the 1998-2001 timeframe, it dropped below its pre-NFA level by 2004 and has continually declined since then:”
https://www.factcheck.org/2017/10/gun-control-australia-updated/
government statistics
http://crimestats.aic.gov.au/NHMP/1_trends/

1m04
claim: “55% increase in the recorded assaults”
https://aic.gov.au/publications/tandi/tandi359
“Assault
Assault is the most common form of violent crime; rates of recorded assault have been increasing steadily over the past 10 or more years. Between 1995 and 2006, the rate of recorded assault rose significantly from 562.8 to 829.4 per 100,000 people … Other research suggests this increase is not a recent phenomenon, but started to rise in the 1970s (Chappell 1995).
…
Sexual Assault
The prevalence of sexual assault is also reported to be increasing. Since 1995, the rate of recorded sexual assault increased by 22 percent, from 72.5 per 100,000 people in 1995 to 88.4 in 2006…”

“Recorded rates of both assault and sexual assault have followed a sustained upward trend since the early 1990s. A simultaneous increase in the reporting of assault suggests this is somewhat responsible for the rise in assault rates. The relationship between rates of recorded sexual assault against those estimated from victimisation surveys is less conclusive, as victimisation surveys produced inconsistent patterns in reporting behaviour. An increased awareness of what constitutes physical and sexual assault (particularly for assaults occurring within the family), a diminishing of associated taboos, a tendency for delayed reporting, and improved police and judicial responses to reports of assault all represent factors likely to have influenced willingness to report (Borzycki 2007; Cook, David & Grant 2001; Lievore 2003; Taylor & Mouzos 2006).”

1m15
claim: “Kidnappings up 52%”
https://aic.gov.au/publications/cfi/cfi103
https://en.wikipedia.org/wiki/Crime_in_Australia#Kidnapping
Kidnapping
“There was a 7.7% decrease in the number of kidnapping/abduction victims in Australia, from 596 in 2013 to a five-year low of 550 in 2014.”

3m06
claim: “Gun ownership is about self defence”

http://www.latimes.com/opinion/opinion-la/la-ol-guns-self-defense-charleston-20150619-story.html
“Parsing 2012 numbers, the center counted 259 justifiable gun-related homicides, or incidents in which authorities ruled that killings occurred in self-defense.

That’s in a nation in which there are some 300 million firearms
…
Those 259 justifiable homicides also pale compared with, in the same year, 8,342 criminal homicides using guns, 20,666 suicides with guns, and 548 fatal unintentional shootings, according to the FBI’s Supplemental Homicide Report. The ratio for 2012, per the Violence Policy Center, was one justifiable killing for every 32 murders, suicides or accidental deaths (the ratio increases to 38-1 over the five-year period ending in 2012). That’s a heavy price to pay.”

5m25
claim: “Armed Robberies up 69%”
https://en.wikipedia.org/wiki/Crime_in_Australia
“Armed robbery
There was a 14% decrease in the number of armed robbery victims (both person and non-person victims) in Australia, from 5,631 in 2013 to a five-year low of 4,855 in 2014.”

 

5m34
claim: “Assault with weapon up 28%”

Assault with weapon is not a category I can find, so I merely report this.

5m36
claim: “Gun Murder up 19%”

https://en.wikipedia.org/wiki/Crime_in_Australia
“There were 238 reported murder victims in Australia during 2014, compared to 245 in 2013
The murder victimisation rate fell to a five-year low of 1.0 victim per 100,000 persons;
Of weapons used in murder, a knife was the most common (44% or 69 victims)”

5m40
claim: “Home invasion up 21%”

https://en.wikipedia.org/wiki/Crime_in_Australia
“Called Unlawful entry with intent;
There was a 6.5% decrease in the number of victims of unlawful entry with intent in Australia, from 194,529 in 2013 to a five-year low of 181,879 in 2014”

Etc etc

In so much as you can cherry pick your facts based on whatever criteria you need to do, it is clear that the debate is simply one of a small minority of gun owners who will try with any argument they can muster to find legitimacy for their position in the face of overwhelming calls from the population to control weapons. When 97% of Americans call for stricter background checks before allowing for a purchase, this is not a small minority. It is everyone who thinks this is fair and needed.