Das <canvas>-Element definiert einen Bereich für graphische Ausgabe. Um zu Zeichnen müssen Sie ein <script> benutzen (üblicherweise JavaScript).
["The <canvas> element is only a container for graphics. You must use a script to actually draw the graphics (usually JavaScript)." Sololearn.com]

Images with 'onClick'

Inserting and changing an image in a <canvas> with onClick

Test the Buttons: Dawn in winter Forrest in spring Red in summer Sky in fall

Test of an embedded video from a different source

The video below is a link to https://www.esa.int/spaceinvideos/content/view/embedjw/476157.

The following information is provided together with the video ( https://www.esa.int/spaceinvideos/Videos/2016/10/Schiaparelli_s_descent_to_Mars)

Title: Schiaparelli’s descent to Mars
Released: 05/10/2016
Language: English
Footage Type: Animation, MP4; Download: 16.48 MB
Copyright: ESA/ATG medialab
Description: Visualisation of the ExoMars Schiaparelli module entering and descending through the martian atmosphere to land on Mars ...