It is highly recommended that you acquire the Heifetz recordings to fully appreciate the magnitude of his legacy. They can be obtained from the usual music outlets. The excerpts below from Heifetz's recordings have been reprocessed and streamed in a compressed format..
Heifetz 1911-12 recordings
Schubert (Fran├žois, Franz Anton) - The Bee (rec.Russia 1911)
Kreisler - Schon Rosmarin (rec.Germany 1912, part of Julius Block cylinder recordings preserved in St. Petersburg, issued by Marston Records)
 
Heifetz post 1917 recordings
Brahms - concerto in D Cadenza (Auer-Heifetz), Chicago SO - Fritz Reiner
Bruch - concerto no.2 in D minor Op. 44
Conus - Violin concerto in E minor
Brahms - Hungarian dance no.7
Valle - Ao pe da fogueira
Rossini-Tedesco - Figaro (Barber of Seville)
Gluck - Melodie from Orfeo and Euridice
Martinů - Duo for Violin and Cello - Gregor Piatigorsky, cello
Gershwin - Summertime
Rachmaninov - Cello sonata in G minor Op.19 - Andante (arr. Heifetz)
Wieniawski - concerto no.2 - Andante
Wieniawski - Capriccio-valse, Op. 7
Sgambati - Serenata Napoletana
Sibelius - Violin concerto in D minor Op.47 - II
Korngold - Violin concerto in D op.35 - II
Saint-Saens - Sonata no.1 in D minor (4th movement: Allegretto Molto
The 'perpetual' Heifetz
Paganini - Perpetuum mobile
Novacek - Perpetuum mobile
The Bell Telephone Hour Orch - Donald Vorhees, 1945
Tansman - Mouvement Perpetuel
Sinding - Suite In A Minor, Op. 10: Presto
Burleigh - Moto Perpetuo
Some Historical Gems
Glazunov - Grand Adagio from 'Raymonda', Samuel Chotzinoff, pf. (rec.1922)
Brahms Double concerto - Emanuel Feuermann, Philadelphia Orchestra - Eugene Ormandy (rec. 31 Dec. 1939)
Tchaikovsky - Eugene Onegin (Act_2) - Lensky's aria (trans. L. Auer) - Samuel Chotzinoff, pf. (rec.1922
Beethoven - Violin concerto in D, NBC SO - Arturo Toscanini (rec. 1940)
Mendelssohn - Violin concerto in E minor, Arturo Toscanini, cond. (live rec. 1944)
Brahms - Violin concerto in D, Boston SO - Serge Koussevitzky (rec. 11 Aprill, 1939)
Korngold - Violin concerto in D op.35,  NYPO - Efrem Kurtz, 30.3.1947
Heifetz 'On the Air'
Armed Forces Radio Service, with Lionel Barrimore
Mozart - violin concert no.4, 2nd mvt. 1942
Schumann - Prophet Bird, 1942
Tchaikovsky - violin comcerto, 3rd mvt. 1942 (ending with the station's signature tune)
Wieniawski - violin concert no.2, 2nd mvt. 1942
Rossini-Tedesco - Figaro (Barber of Seville)
Scott - Bygone Memories (Tallahasse suite) 1942
Dohnany - Andante rubato,  1942
Mairzy Doats
Heifetz & Jack Benny skit (Aug.17, 1942)
Bell Telephone Hour, Donald Vorhees, conductor
Bach-Gounod - Ave Maria (chorus and orchestra c.1945)
Berlin - I'm dreaming of a white Christmas c.1945
Vieuxtemps - Ballade & Polonaise
Stars Spangled Banner (arr. Heifetz)
Villa-Lobos - Moth around the Flame
Ravel - Tzigane
Sarasate - Introduction & Tarantelle Op.43
Hubay - The Zephyr
Benjamin - Jamaican Rumba
Brahms - Double concerto, Gregor Piatigorsky cello, NYPO, Leonard Bernstein, live, September 1, 1963.
  Encore: Handel-Halvorsen - Passacaglia
The lighter Heifetz
Joseph Hague, violin - Floyd E. Sharp, piano
Poliakin - Le Canari
Saint-Saens - Introduction & Rondo Capriccioso
Sarasate - Habanera
Heifetz - "When You Make Love To Me, Don't Make Believe"- orchestra, Harry Lillis, Bing Crosby, vocal
Heifetz at the piano
Heifetz and Isidor Achron - Mixing it four hands: Beethoven violin concerto intro turns into Padilla's Valencia. 1928
Jim Hoyl - "When You Make Love To Me, Don't Make Believe" - Heifetz, pf.
Masterclass
Demonstrating an "audition" to his students (you can watch it on video in Media)
Teacher-pupil communication