Flash upgrade; 5 year old mac 5; is there a way without being jacked?

Question

I spent all the money I had on Apple products just 5 years ago spending sixteen thousand dollars on my MAC 5 with all the bells and whistles you can think of. Now, all over the internet there is a growing experience of receiving more and more error messages stating that my system is no-longer compatible. The latest being a visit to my Facebook page where I uploaded a video and shortly thereafter I received a message that says I must upgrade Flash Player. Of course, you already know that anything new won't play on a Apple MAC 5 OS 10.4. 
Oh, it was so exiting back then. Got my new computer and it wasn't just any ol' computer it was an Apple computer! 
Now I'm being treated like dirt. Even Apple has turned a deaf ear. They said that I will have to throw my $16K computer in the dumpster and spend another $16k on another Apple product to reach that height of bliss I experienced 4 years ago.  And what happens 4 years from now. Is it to the dumpster again? But before the dumpster, will I get the dirt treatment again? The error massages? The deaf ear?
Some of you may think that 5 years is old. I still have my 30 year old 16 track Teac  reel to reel linear recorder with encoder and  control panel that still works with the most incredible sound that most highly technologically talented gurus of today have never experienced.
"Flash upgrade; 4 year old mac 5; is there a way" to upgrade without having to buy a whole new Apple computer?...as opposed to relying on my Windows XP more and more?
If it is your intentions to ridcule me because I'm poor now, please save it, I feel bad enough as it is. Believe me, if I had the money, I'd probably keep buying more and more just like you...
...(or maybe not).  Will Apple appreciate my second $16K purchase as much as it did the first one? Will it reward me the same as the first?
It's all I have left, I can't play my own video on my own Facebook.
(This will probably get deleted)

Answer 1

Thanks John.
I have a Mac OS X vers 10.4.11 with 4 x 2.5 GHz PowerPC G5; Memory 4.5 GB DDR2 SDRAM
I do not have Intels.
When you go to a person to ask for investment capital, they want to know everything you need to create a successful business. Couches, chairs, office rental, electricity, gas,  cell phones, land line, fey boards, fax machines, microphone mixers, sound samplers, speakers, CRT monitors, printers, audio boards, microphones, cameras, advertising, transportation, including computers.
When you go out of business, the investor sells what ever he can get his hands on,  couches, chairs, tape decks, monitors, keyboards, including computers, ell phones, land line, fey boards fax machines, microphone mixers, sound samplers, speakers, CRT monitors, printers, audio boards, microphones, cameras,  including computers.
My tax corporation depreciates those items on my taxes each year as tax credits.
If the investors and the IRS treats them as assets, who's to argue? 
I looked at my Apple invoice and it reads $16k, however, I was reluctant to consider other items on the invoice. I should not include all  items  but for the most part , with all the bells and whistles including soft ware, (adobe etc) it came to $16k ( in which I gladly paid. I was happy)
I'm real happy that you are still able to occasionally use your Powerbook as you are probably happy that I can occasionally still use my 16 track reel to reel.
I am not trying to run Adobe Flash I am trying to run what ever the internet dictates to me to run.
Ranting? Unprofessional? I am one of the most professional people you can meet. Turning 60 next year, I have many years invested in production in radio and television, rubbing elbows with many famous and well known people in the entertainment industry. Many of whom share in my dilemma. When a company has an opportunity to observe growing issues first hand from its client base about their product or service, is always a good thing.
Opportunities for that company are created! A good company, when opportunity knocks, takes advantage of the opportunity, others complain about the noise.