Google´s Video channel has a very large selection of Toastmaster Videos, just search with toastmaster – region – subject – name…
2016 the worldchampion is Darren Tay:worldchampion speech 2016
In our district (D95+59) we have some with their own channel giving tips eg Connor Neill, Florian Mück and our very own (well she is from Berlin but kickstarted here at the Hamburg District Conference) Olivia Schofield
Matt Abrahams gives you tips when afraid of public speaking:Communication Techniques
he also has his own blog.
Nancy Duarte tells you about the importance of storytelling:engage through stroytelling
and then of course there is TED: TED
with terribly enigmatic delivery you are not only taught how to present statistics (Hans Rosling) or how to take life and work ( Shawn Achor), how to design, perform, … you can take your pick of interest and learn by example, (and read a rhetorical analysis on John Zimmer´s blog), and you actually have playlists on different subjects eg.
how to tell a story and many more
Just listening there is an eclectic collection of podcasts: time to shine
“When somebody is speaking with an accent it only means he knows other languages too”
these are just some few examples and not pretending to be exhaustive at all and only in English, there are many more in other languages too !
Enjoy and practise, practise, parctise !