If you are a music fan with a general interest in Hendrix and after an understanding of the phenomenon that he was and still is nearly 40 years after his death, then do not start here! Far better to start with the Joe Boyd re-released and expanded DVD if you are looking for answers to those questions.
The two DVDs (which at 112 minutes total could easily have been fitted onto one DVD) are unauthorised by the Hendrix estate which means as a consequence that little original film footage is used with instead large use of panning shots on photos (many repeated across the film and often used out of time sequence in the story) and little or no music from the Experience over both sets.
What you do get which even for the completists will be of differing interest is a set of interviews which are of varying quality and wildly disparate content. The DVD "Those who knew him best" is a mix of two parts. The UK part apart from endless recycling of a TV appearance performance has various persons who were around Jimi during his breakthrough UK years among them Keith Altham who because of his PR background is the most articulate; Gerry Stickells the long standing roadie to the group looking very frail; and, Geno Washington (UK soul legend?) being interviewed at the bar of his local pub, who comes across as largely guilty of an overstated personal involvement in events. The US part is largely centred around Hendrix's "Rainbow Bridge" period with that film's director plus his girlfriend of that time (Melinda Merryweather) serving to indirectly and unintentionally emphasise why that film and its related LP has always been a record of a messy 60s event, though the inclusion of live performances from the Maui concert does give us glimpses of some live music. Of rarity value is an interview with Ed Chaplin who was an early US record producer pre Jimi's UK breakthrough and simply confirms how naive Jimi must have been in terms of his music business dealings based on what is stated here.
The better of the two DVDs (and the reason why this review just about made it to two stars) is "By those who knew him best". With no music at all from Jimi, it again follows an approach of interviews spliced with photos and documentary dialogue links which at least follow a better chronological ordering of the material. The rare items are interviews with many who knew Jimi in his early days in Seattle and on his triumphant US return, including his younger brother Leon and well known local Seattle DJ Pat O'Day. The UK end is largely other Experience roadies who worked with jimi and have many interesting off record observations rather giving a detailed understanding of events or the music. The other US participants are an interesting mix of Hendrix musicologists who have clearly studied in detail many aspects of the man's life and music or were on the scene at the same time as Hendrix. By far the most fascinating of all these is Tony Bongiovi who was console engineer at many of Hendrix's later era Factory Plant recordings and was called on after Jimi's death to piece together a number of the Alan Douglas produced posthumous releases.