Both correct.
LATAM implemented the IFE-from-ground programme a couple years ago. You can start watching a movie soon after boarding. The movie will have a couple interruptions (during the in-flight safety video and any announcement made by cabin crew and flight crew over the PA channel) but you can start well before pushback.

You must adhere to the fully upright position for your seat regardless of cabin. For your safety and that of others. You can recline right after takeoff