This is not bootanimation, this is the splash screen (the boot logo which is displayed when device is switched ON).
This is for BQ Aquaris M5 Only..
(For other devices, please send me your splash.img so that I can create a tool for you too.)
STEPS to create & flash splash.img:
Same procedure as in here:
[GUIDE] How to Create Custom Splash Screen (Boot Logo) for Lenovo Vibe X3
(I have attached the stock picture).
Thanks to @Typhus_ who provided the stock splash.img of BQ Aquaris M5
Hit the Thanks button if it worked for you
You're welcome to post the splash images that you created..