From the 1800's to 1970's. You can watch some from Youtube or you can buy his legal DVDs: http://romanoarchives.altervista.org/page44/page44.html Others (Ford Only) are available from this classic parts dealer's pages: http://www.gregsonline.com/eshop/DVDs/Ford_DVDs.htm Heck of a range of stuff too, even antique truck and tractor parts, manuals, Shop manuals on CD from 1916 to 1981 - All US makes. http://www.gregsonline.com/
If you plan to buy DVDs or VHS tapes of classic car commercials or promotional films then don't forget www.historicvideoarchives.com This is a small mom and pop type company in New Jersey that I ran across in Hemmings maybe 15 years ago. For purchase, his offerings are are much more extensive (but not expensive) than any other source i have ever found. I strongly suspect that many commercials that you find on Youtube and on more commercially available tapes and dvds, are merely highlights copied from Historic Video Archives material. Keep in mind that many of his offerings are two hours long, while many of his competitors offer 1/2 hour to one hour videos. I highly reccomend these collections, most of which you'll never find anywhere else.