Gullah were people brought to the US from the Angola region of Africa. They were primarily enslaved in the Coastal regions of the Carolinas and Georgia. At the advent of the US Civil War the Sea Island were abandoned by the white inhabitants for fear of a Naval invasion. Left to determine their own fate the Gullah return to their cultural roots from Africa. Given the difficulty the land and sea presented there was not a large return to the island following the Civil War and the Gullah were able to live mostly on their own terms till the early 20th century. They possess their own language and maintain strong cultural ties even as their offspring moved to other areas of the nation.
They were not however the driving force of the Seminole Indian wars.
Slave often escaped into Florida from Georgia. These slaves either traveled further south to Cuba or settled with the Seminoles. Those that stayed with the Seminoles were integrated into the tribe.
The video does capture the fact these wars were unsuccessful 'victories' for the US. That is each war ended with a treaty that the US basically wanted but at a high cost. However to claim that a conflict the inflicted in total 3000 US casualties over 40 years, the majority from disease rather than combat, is the chief reason for the end of slavery in the US is laughable.
The claim that the Gullah were Muslim is wrong.
The claim that the British trained escaped slave in Flordia is wrong
The claim that leaders from the Negro Fort massacre escaped and changed tactics is wrong. The 2 leaders from the fort were killed by Creek Indians and the 23 other survivors sold back into slavery.
The uniforms presented in the video are from Haiti not a Gullah nation.
The video selectively takes battle from the Seminole War that were native victories and ignore native defeats.
The video inflates odd events such as the Battle of the Sawnee. 10 or so dead ... total.
In all the central claim is flawed and the support information is highly selective. I am quite happy to see the Stono Rebellion and the Denmark Vesey conspiracy get a little exposure. There was also Gabriell Prosser rebellion and the german Coast uprising along with maybe 2 dozen more revolts. The Denmark Vesey incident was prompted by the forced closing of a black church not the influence of a recaptured slave from Flordia though.