For a similar one - look for the story about "A Lion Called Christian". There is a video, a short bit from a film they made about their lion.
Back story - two young blokes living in a flat in Harrod's (London) actually bought this lion cub in the store (they say you can buy anything in Harrod's) and kept him in the flat. When he got too big they were told they'd have to take him to a zoo, but they didn't want to do that. This was in the 70s, they contacted George Adamson and asked him to help. George took Christian for them, paired him up with another lion (Boy, I think it was) and managed to get Christian back into the wild and living independently, although still near George's camp. The film snippet was taken when they two blokes went back for a visit to see how Christian was getting on. You can see the lion's face - he approaches warily, then his mouth opens as he recognises them and begins to run to them. He jumps up on them and from there, it's like this video of the woman and her lion, but without the bars.
I remember reading the book, then later seeing the film. Absolutely wonderful.
I just did a quick search - here is a really good reference, with the video clip (although it might be shorter than the clip we got sent).
http://www.hoax-slayer.com/true-love-lion.shtml
Marg