Public Session Page: Show social links, embed youtube or other video, add link to slides

[mariobehling]

The public session page should show the following additional items similar to generated website: http://2019.fossasia.org/event/schedule.html#5227

• social links
• embed video, e.g. youtube
• link to slides

Example for a session page: https://eventyay.com/e/8fa7fd14/session/6258

[gr8geek]

@mariobehling can I takeup this issue