You could try this. It is best used on the Raspberry Pi 2, because this is pure software rendered and will use a lot of CPU. You need to have Chromium installed.
tar -xzf PepperFlash-184.108.40.206-armv7h.tar.gz
chmod +x *
sudo cp * /usr/lib/chromium/plugins
sudo nano /etc/chromium/default
or later version. With the same steps as above, just replace version numbers as required.
Uncomment the line starting with "CHROMIUM_FLAGS=". Add the following line.
CHROMIUM_FLAGS="--ppapi-flash-path=/usr/lib/chromium/plugins/libpepflashplayer.so --ppapi-flash-version=220.127.116.11 -password-store=detect -user-data-dir"
- Open Chromium
- Enter chrome://plugins
- The pepperflash-plugin should be visible. Enable it.
Flash animations work well, Flash video to a certain degree, depending on video resolution. There are reports though that Spotify specifically may not work because of lack of NPAPI in Pepper Flash, but some recent changes may have fixed it.