No - the Soviets did not hand over thousands and thousands of Jews to the Nazis before the outbreak of World War II. The claim is inaccurate.
The pact was signed by Molotov (seated) and Ribbentrop (standing 3rd from left). Source: WW2History.com
The Molotov-Ribbentrop Pact was signed 23 August, 1939. World War II started 1 September, 1939 with Germany's invasion of Poland. This means there was one week between signing the Pact and the start of WWII. The Pact was only in force one week before the war started, so the Soviet Union, logistically, could not have
handed over thousands and thousand of Jews to the Nazis
in that one week after the signing of the Pact
before the outbreak of World War II.
Because there are some complexities involved in this issue which should be considered, three additional points for more context around the topic are included below.
The first point is added in case the documentary intended to imply a cooperation before an outbreak of hostilities between Germany and the USSR (22 June, 1941) rather than the outbreak of the War (1 September, 1939).
The second point is added to illustrate that while the claim in the Question is incorrect, and instead many Jews fled Nazi territories to the relative safety of the Soviet Union, that relative safety was not long enjoyed.
The third point below is added to lend support to the overall theme of the documentary cited in the Question, that many nations and territories cooperated with the Nazis in their murderous goal of purging Western and Eastern Europe of the Jews (including many local citizens and authorities in some Soviet territories).
1) Did Stalin's Soviet Union hand over thousands and thousands of Jews before open hostilities between the Nazis and the USSR in 1941 (while the pact was still publicly observed by both parties)?
2) Was Stalin's Soviet Union innocent of atrocities against the Jews?
3) Was there any cooperation or collaboration with the Nazis in occupied territories of the Soviet Union after the Nazis invaded the USSR in 1941?
From the signing of the pact in 1939 to the breaking of the pact in 1941 there is no documentation to support any Soviet-sponsored deportation of Jews from the USSR into Nazi controlled territories. In fact, to the contrary, Yad Vashem's article on the Soviet Union
Following Hitler’s rise to power, Germany and the Soviet Union behaved as
mortal enemies. One month prior to the outbreak of World War II, however,
the two countries surprised the world by signing a "non-aggression pact"
(Nazi-Soviet Pact), in which they agreed to abstain from attacking each other.
This pact allowed the Germans free reign to invade Poland without Soviet
intervention. In exchange, the Soviets were given the eastern parts of Poland
and the Baltic countries of Latvia, Lithuania, and Estonia. Over the next year
the Soviets also annexed Bessarabia and Bukovina, which had been under
Romanian rule since World War I. Altogether, these new territories had a
Jewish population of about 2 million. Additionally, about 250,000—300,000
Jewish refugees from German-occupied western Poland had fled to the Soviet
Union after the war broke out. Jewish populations in these territories did not
live under the best conditions but at this point, they were spared the
systematic extermination suffered by Jews under the Germans. [emphasis added]
Thus we see, rather than Jews being handed over from the Soviet Union to the Nazis, an opposite effect was taking place: Jewish refugees were fleeing to the Soviet Union from Nazi expansion eastward into Poland.
No, the Soviets were not innocent of atrocities of their own against the Jews and Poles and other ethnic minorities. As the World Affairs Journal
article on Soviet-Nazi Collaboration and World War II
Completely indefensible is the secret protocol that led to Poland’s partition in September 1939 and the subsequent Soviet attack on and incorporation of Estonia, Latvia, and Lithuania...
... during the two years the Soviets ruled Western Ukraine (the former eastern Poland), they destroyed civil society, dismantled all political and civil rights, deported hundreds of thousands of Poles, Jews, and Ukrainians to Siberia, and then, to top things off, massacred some 20,000–30,000 political prisoners in the week after the Nazis attacked in June of 1941. (About 70 percent were Ukrainian, 20 percent were Polish, and over 5 percent were Jewish.) ...
Yes, there was local collaboration and cooperation in some
Nazi-occupied territories of the USSR. When Operation Barbarossa
began, the fate of the Jews in the Soviet Union started to change (due to the presence of the Nazis). Yad Vashem's Soviet Union
The relatively good status of Jews in the Soviet Union did not last long. In
mid-1941 the Germans decided to betray their pact with the Soviets and
secretly planned to attack the Soviet Union in Operation "Barbarossa." In
preparation for their invasion, the Nazis ordered the extermination of all Jews
living in those areas annexed by the Soviet Union in 1939--1940. The
Germans attacked on June 22, 1941. After the invasion, more than 5 million
Jews came under Nazi rule, constituting over half of Europe's Jewish
population. Einsatzgruppen followed the advancing army and with assistance
from local collaborators and various police and regular army (Wehrmacht)
units, they quickly massacred most of the Jews of the Baltic States,
Belorussia, and the Ukraine by shooting into open pits. The remaining Jews
were put into ghettos, and most were murdered within 12--18 months.
As indicated above, after the Nazis broke the Pact and invaded the Soviet Union and expanded into the western reaches of the Soviet Union, there was direct cooperation and Nazi collaboration among the locals in several areas, for example in the Ukraine and in Byelorusia, with the Einsatzgruppen in rounding up and murdering Jews (refer to The Holocaust in the Ukraine and The role of the Belarusian Auxiliary Police). But this was not a Soviet policy (local dissidents in some areas who viewed the Nazis as Liberators collaborated with the Nazis and were viewed as Traitors by the Soviet Union) and had absolutely nothing to do with the (now broken) Molotov-Ribbentrop Pact.