A: Yes. Manufacturers keep samples short to avoid massive file sizes (100 Mbps x 30 seconds = 375 MB).
Forums like DVXuser, EOSHD, and the Sony Alpha subreddit are treasure troves for raw footage. sony zv-e10 sample video download
While YouTube compresses video heavily, Vimeo allows for much higher bitrate playback and sometimes direct downloads. A: Yes
That is where come in.