You can embed videos in your post or page content. Here is an example from YouTube. Many other popular sites are supported. You can even upload your own video to WordPress. The theme makes the videos responsive so they show nicely on mobile devices.
Posts by Joe Ryan (Page 5)
Sic enim dilexit Deus mundum ut Filium suum unigenitum daret ut omnis qui credit in eum non pereat sed habeat vitam aeternam. Omnis enim quicumque invocaverit nomen Domini salvus erit. Et ait faciamus hominem ad imaginem et similitudinem nostram et praesit piscibus maris et volatilibus caeli et bestiis universaeque terrae omnique reptili quod movetur in terra.
In principio creavit Deus caelum et terram. Propterea sicut per unum hominem in hunc mundum peccatum intravit et per peccatum mors et ita in omnes homines mors pertransiit in quo omnes peccaverunt. Sic enim dilexit Deus mundum ut Filium suum unigenitum daret ut omnis qui credit in eum non pereat sed habeat vitam aeternam.
Normally, an excerpt is shown on the short view of a post (when viewing multiple posts). The excerpt can be manually entered or automatically generated from the post. Instead of showing the excerpt, you can show the first part of your actual post content (including formatting, images, etc.) and control where it breaks.