PPPoE with Movistar VLAN on GL.Inet routers (OpenWRT)

In this video, I talk about how to configure a PPPoE connection for Movistar (which uses a VLAN for Internet data) on GL.Inet routers with OpenWRT.
Movistar and O2 are Internet providers in Spain and other countries.
This video is also valid for DIGI (the romanian provider) and all the other Internet providers that use a VLAN for Internet data.
More on Movistar and O2 VLANs:
• ¿Qué es la triple VLAN...