** Shares of U.S. video platform and cloud services provider Rumble RUM.O soar 13% to $8.35 premarket
** Co partners with AI start-up Perplexity to help improve content discovery on Rumble.com
** Deal to roll out a new subscription bundle that combines Rumble Premium with Perplexity Pro
** Perplexity's AI-powered browser Comet to be promoted in RUM's ecosystem
** Partnership to help users discover content relevant to them in a crowded media landscape - RUM says
** Up to last close, RUM shares down more than 43% YTD
(Reporting by Avinash P in Bengaluru)
((Avinash.P@thomsonreuters.com;))