I've decided to make a masterpost of free and full adaptations:
Richard III: here's the 1955 one with Laurence Olivier, and here's the 1995 one with Ian McKellen. (the 1995 one is in english subtitled in spanish. the 1955 one has no subtitles and might have ads since it's on youtube)
Macbeth: here's the 1961 one with Sean Connery. Here's the 1971 by Roman Polanski, with spanish subtitles. Here's the 1948 one with portugese subtitles and here the 2001 one). The 1969 version with Ian McKellen and Judi Dench is here and the 1966 BBC radio one is here.
Hamlet: The Kenneth Branagh 1996 Hamlet is here, the 1964 russian version is here and the 1964 american version is here. THe american version has a young Michael Caine and a young Christopher Plummer. THe 1964 Broadway production is here, the 1948 Laurence Olivier one is here.
Timon of Athens is here. Troilus and Cressida can be found here
Julius Caesar: here's the 1979 BBC adaptation, here the 1970 John Gielgud one
King Lear: Laurence Olivier once again plays in here. And Gregory Kozintsev, who was I think in charge of the russian hamlet, has a kng lear here. The 1975 BBC version is here.
Henry IV: part 1 and part 2 of the BBC 1989 version.
Henry V: Laurence Olivier (who would have guessed) 1944 version. The 1989 Branagh version here.
Much Ado About Nothing: Here is the kenneth branagh version and here the Tennant and Tate 2011 version.
Twelfth night: here for the BBC, here for the 1970 version with Alec Guinness, Joan Plowright and Ralph Richardson.
Please do contribute if you find more. This is far from exhaustive.