Update README main title and display preview video

[rm3l]

What type of PR is this:
/area documentation

What does this PR do / why we need it:
This is an addendum to #6862, to be consistent with the main title on https://odo.dev/ and the project description.

Which issue(s) this PR fixes:
Fixes #6794

PR acceptance criteria:

• Unit test

• Integration test

• Documentation

How to test changes / Special notes to the reviewer:
Preview: https://github.com/rm3l/odo/blob/6794-mention-podman-support-on-website--addendum/README.md

[netlify]

✅ Deploy Preview for odo-docusaurus-preview canceled.

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🔨 Latest commit	c03b478
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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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[odo-robot]

Kubernetes Docs Tests on commit edf0bf3 finished successfully.
View logs: TXT HTML

[rm3l]

INFO[2023-08-22T10:26:50Z] build didn't start running within 30m0s (phase: Pending):
Found 1 events for Pod root-build:
* 2023-08-22T10:21:54Z 127x default-scheduler: 0/18 nodes are available: 1 Insufficient cpu, 1 node(s) didn't match Pod's node affinity/selector, 1 node(s) had untolerated taint {node-role.kubernetes.io/ci-longtests-worker: ci-longtests-worker}, 2 node(s) had untolerated taint {node-role.kubernetes.io/infra: }, 3 node(s) had untolerated taint {node-role.kubernetes.io/ci-prowjobs-worker: ci-prowjobs-worker}, 3 node(s) had untolerated taint {node-role.kubernetes.io/master: }, 7 node(s) had untolerated taint {node-role.kubernetes.io/ci-tests-worker: ci-tests-worker}. preemption: 0/18 nodes are available: 1 No preemption victims found for incoming pod, [17](https://prow.ci.openshift.org/view/gs/origin-ci-test/pr-logs/pull/redhat-developer_odo/7037/pull-ci-redhat-developer-odo-main-odo-ocp4.13-lp-interop-images/1693925142243053568#1:build-log.txt%3A17) Preemption is not helpful for scheduling.. 
INFO[2023-08-22T10:26:50Z] Ran for 30m0s

/override ci/prow/odo-ocp4.13-lp-interop-images
/override ci/prow/odo-ocp4.14-lp-interop-images
/override ci/prow/v4.13-images

Not relevant for this PR.

[openshift-ci]

@rm3l: Overrode contexts on behalf of rm3l: ci/prow/odo-ocp4.13-lp-interop-images, ci/prow/odo-ocp4.14-lp-interop-images, ci/prow/v4.13-images

In response to this:

INFO[2023-08-22T10:26:50Z] build didn't start running within 30m0s (phase: Pending):
Found 1 events for Pod root-build:
* 2023-08-22T10:21:54Z 127x default-scheduler: 0/18 nodes are available: 1 Insufficient cpu, 1 node(s) didn't match Pod's node affinity/selector, 1 node(s) had untolerated taint {node-role.kubernetes.io/ci-longtests-worker: ci-longtests-worker}, 2 node(s) had untolerated taint {node-role.kubernetes.io/infra: }, 3 node(s) had untolerated taint {node-role.kubernetes.io/ci-prowjobs-worker: ci-prowjobs-worker}, 3 node(s) had untolerated taint {node-role.kubernetes.io/master: }, 7 node(s) had untolerated taint {node-role.kubernetes.io/ci-tests-worker: ci-tests-worker}. preemption: 0/18 nodes are available: 1 No preemption victims found for incoming pod, [17](https://prow.ci.openshift.org/view/gs/origin-ci-test/pr-logs/pull/redhat-developer_odo/7037/pull-ci-redhat-developer-odo-main-odo-ocp4.13-lp-interop-images/1693925142243053568#1:build-log.txt%3A17) Preemption is not helpful for scheduling.. 
INFO[2023-08-22T10:26:50Z] Ran for 30m0s

/override ci/prow/odo-ocp4.13-lp-interop-images
/override ci/prow/odo-ocp4.14-lp-interop-images
/override ci/prow/v4.13-images

Not relevant for this PR.

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