You could do it in a single field but that would violate a lot of DB design rules and would lead you into trouble in the future. It's best to add a new table with Date, Company Name and Ref# fields. The new table should also have a field that uniquely identifies what video it's related to. Ideally your original table should have a unique serial number for each video. Then each license record in the license table that relates to that video would have a field with that serial number as well.
This way you could have a portal in your original layout that shows you a list of the licenses. It would also allow you to search by date, company, Ref # or serial number in licenses. You would have much more flexibility to make reports and layouts in the future if you design your DB correctly in the beginning.
Google FileMaker Tutorials, there's lots of stuff out there to get you started.
As Brain Crockett stated you need a related table, so you need to research relationships and or portals.
Thanks kindly for the advice, helped point me in the right direction and I think I've almost got it straightened out. I ended up looking at this tutorial by Guy Stevens https://www.youtube.com/watch?v=Em-W3dc0OLk which helped me set up a related table.
Guy Stevens is or was a member on this forum, it has been a while since I seen any of his comments, so I guess he still a member. I've seen his videos on youtube and they are very informative and the best part they are free. There are several good books on filemaker and Filemaker also has a couple of training series, basic is free and the advance cost.
http://www.filemaker.com/support/training/ This has a link to the training series but I will add a direct link.
http://www.filemaker.com/support/training/fts.html Direct link to the training series
Thanks for the links. Guy Stevens is beyond generous and his tutorial is fantastic... Thanks so much all for the guidance i was able to work it all out nicely.