if I install a font, can I use it again and again for commercial purposes for videos/posters? I will use it only while having my subscription active but after 1-2 years, the videos or posters can still be used, right?
For fonts and add-ons, a Single Use is the installation of the Item on your device. The license starts when you Register the installation, and you can then use the font or add-on to create as many projects as you like, for as long as your Envato Elements subscription remains active.
You can find more info here:
Yes, the videos and posters that you created and finalised during the subscription, can be used after the subscription.