Crossword puzzle clue "insert into an email as a video"

Insert into an email, as a video

"7. I was so into video games as a kid (I drove at least two ___ into the ground), I was convinced I was going to make them as an adult."

Whence the line "Into the eternal darkness; into fire and into ice"

Insert coins into, as a meter

What you'd insert into an old-style camera

Insert wood, stone or metal into a surface

Insert film into a camera

(In computing) insert text into a document